This is "Peter Graves" by William Pene du Bois. The anti-gravity material is called Furloy.
It's a short book though, not a short story. Published in 1950. My copy is from 1972.
The cover image shows the harness you mention (with golf club head covers holding the Furloy balls, and a fishing rod safety tether).
And here's a scan of an interior illustration ...
Bugs Bunny's Carrot Machine (1971)
Here is a picture of the machine and Bugs putting junk in to get it to work.
And the machine does eventually break down explode due to Bugs being too greedy and shoving too much junk into it as shown above.
The whole thing is being shown in this YouTube video:
This is The Book of Foolish Machinery by Donna Lugg Pape.
It contains 'The Click Clacker Machine' and other poems including 'The E Eater Machine' (which I hav r produc d in full b low)
The E-Eater Machine likes to gobble up E's.
It eats all the E's out of words that it sees.
If the E-Eater loses its glasses it takes
The I's out of words, but soon ...
Could this be Rusty's Space Ship (1957) by Evelyn Sibley Lampman?
There was no way for Rusty Adams to know that the shiny metal disc he had found at the city dump and used on his play space ship in the garage, was actually the flying saucer of the Mighty Gwump of Eopee in Adromeda Galaxy. When tiny Tiphia, Gwump's messenger, arrived to claim it, Rusty and ...
This sounds a bit like The Hounds of the Morrigan by Pat O'Shea. There is a Wikipedia article on the book here. This was published in 1985 so it fits your time frame, but it's a lot longer than 60,000 words.
The bit I remembered was the handcuffs, but they were made from daisy chains not dandelions. Brigit puts the handcuffs on the witches Melodie Moonlight ...
I'm pretty sure you're thinking of The Faraway Tree, a series by English author Enid Blyton. Books in the series include The Enchanted Wood and The Magic Faraway Tree.
The "pancake person" was probably Moon-Face, named for his round face that looks like the moon.
In the first novel in the series, Jo, Fanny and Bessie move to live near a large wood. One ...
This sounds like "Only You Can Save Mankind" by Terry Pratchett.
"...send him a message with a picture of some weird eggs with legs and something like 'Please don't shoot! There are children on board!'"
The alien spaceship is in his sights. His finger is on the Fire button. Johnny Maxwell is about to set the new high score on the computer game Only You ...
Bob Fulton's Amazing Soda-Pop Stretcher: An International Spy Story (1963) by Jerome Beatty Jr.
Child prodigy Bob Fulton invents a machine that will turn one bottle of soda pop into several. Something goes wrong and the machine explodes. That's when he discovers it turned the soda into the perfect frictionless lubricant. His sister and her friends use it to ...
The series is the "My Robot Buddy" series by Alfred Slote. The books in the series include:
My Robot Buddy (1975)
My trip to Alpha I (1978)
C.O.L.A.R. : a tale of outer space (1981)
Omega Station (1983)
The Trouble on Janus (1985)
The androids looked exactly like humans, except that they could only walk without bending their knees.
This was a ...
Great job including enough information to find the book! Using ISFDB, I believe I've found it: The Book of Dragons, edited by Michael Hague. It includes "The Adventures of Eustace" by C.S. Lewis and "The Dragon Tamers" by E. Nesbit. There was also an excerpt from The Hobbit. It also includes interior artwork by Michael Hague.
The cover art is:
The full ...
It could be The Wayfinder by Darcy Pattison. Description from Goodreads:
Young Winchal Eldras is a Wayfinder, one of the gifted few of G'il Rim
who have the ability to locate anything: a lost ring, the way home, a
blue dress in the marketplace, a lost child. "Finding" is a valuable
talent in this city that sits dangerously close to the Rift, a
Rebecca's World by Terry Nation.
Here is a review that outlines the plot.
It turns out that a very nasty man, Mister Glister, is the richest man in this world, and as he explains to our heroine most seriously, 'I've made it my life's work to make everyone poor', and he has done it by burning all the trees down in the world to feed his industry and make ...
The Lost Kingdom of Karnica by Richard Kennedy. Illustrated by Uri Shulevitz.
There is a Kirkus review of the book here. The summary they give is:
A parable of greed, a conservationist allegory, but also a forceful, beautifully told story.
In the Kingdom of Karnica, an enormous red gemstone is found at the bottom of a well; and life, "not especially ...
Dark Life (2010) by Kat Falls?
From Scholastic, which lists it at aimed for 10-13 years old:
Dark Life is set in an apocalyptic future where rising oceans have swallowed up entire regions, the Earth's shifting plates have fractured entire continents, and pollution has eaten away the ozone layer. On the dry land left, people live packed like sardines, ...
Sounds like Earthdark, by Monica Hughes.
It is set on the moon. Kepler Masterman found life difficult on his return from an exciting trip to Earth. Seeking excitement he took a forbidden trip to the Moon's surface, which nearly cost him his life. On returning to he found his girlfriend's father had disappeared. Danger everywhere and in the unknown region ...
Encounter Near Venus by Leonard Wibberley (1967)
From the Kirkus review:
Four children (two brothers -- two sisters) are sent to their
mysterious Uncle Bill's house in a Colorado wasteland for an eight
week summer vacation. Before their plane lands they have managed to
spot two flying saucers (one pink). Equally colorful adventures are in
This is Others See Us by William Sleator as covered in this answer.
Just before a gathering of relatives, Jared, 16, falls into a swamp polluted with toxic waste; soon after, he discovers that he can read minds, learning--to his horror--that outwardly perfect cousin Annelise is a monster who's already responsible for the death of one fancied rival and the ...
Potential match: Johnny and the Bomb, by Terry Pratchett. This is a part of a trilogy written by Pratchett, rather than numerous different authors, but there was also a TV adaption. It was first published in 2007, so it fits within the specified time period.
The antagonist does indeed become a wealthy CEO in a motorised wheelchair.
Doctor Illuminatus by Martin Booth
Google book summary:
Pip and her twin brother, Tim, awaken an alchemist's son from a
centuries-long slumber when their family moves to an old English
country estate, and he enlists them in the fight against an evil
alchemist who seeks to create a homunculus.
Reviewer mentions disemboweled dog and man with crushed ...
The story certainly sounds like that of the Jim Henson/Frank Oz film The Dark Crystal. There is a short illustrated version of the story still in print: The Tale of the Dark Crystal.
I have not looked at this specific picture book since I was in elementary school, but virtually everything in the question matches elements from the movie's plot:
Jen is ...
This may be Aliens: Terrifying Extraterrestrial Tales by Don Wulfsson. "The Dastasian Invasion" was the story with them building the "garbage disposals", as mentioned in the answers to Looking for a story about aliens building invisible structures on earth and Collection of youth short stories about aliens 1990-1994ish.
It's also the story with the humans ...
Flower Children: The Little Cousins of the Field and Garden by Elizabeth Gordon and illustrated by M. T. Ross
Originally published in 1910 it has been re-published numerous times and so there was likely an edition out there that was mainly purple in colour. The foreward starts off as:
ALL children are flowers in the garden of God’s love. A flower is the ...
According to some fragments I found in New Statesman, vol. 46 it could be
The Man from Outer Space by Douglas V. Duff (1953).
There is certainly a being (The Ancient) from some miles off in The
Man front Outer Space but he remains sadly earth-bound. He is planning
world conquest from a new-fangled submarine and can assume any human
Going out on a limb here, but The Snowstorm by Beryl Netherclift?
Farthingales is Aunt Amethyst. The children agreed on that. She was
trying valiantly to save the gabled old house in the English
countryside, which was beset by taxes and falling into ruin. From the
first day of their visit, Caroline, Richard, and Kit were determined
Singer to the Sea God by Vivien Alcock
A grand adventure set in ancient Greece. One look at Medusa, and Cleo
turns to stone. Phaidon cannot leave Cleo behind when he escapes with
his uncle and two other slaves. But the sea trader who has helped them
now abandons them, taking Cleo with him. Marooned on an island haunted
by strange echoes, they face ...
I can't find anything that exactly matches the description or the white book cover, but there are a couple of tie-in children's books to The Ewok Adventure films (Caravan of Courage & Battle for Endor), such as
The Ring, the Witch, and the Crystal:
The Ring, The Witch, and The Crystal: An Ewok Adventure was a
children's book that was released in ...
The book is Phillip the Flower-Eating Phoenix, by John Todaro and B. Ellen, published by Abelard Schuman in 1961. The colorful illustrations seem to be made of paper cutouts like those Matisse used. I found it by Googling for "flower-eating bird" kirkus, which gained me a brief Kirkus review published September 15, 1961. Armed with the title and name of ...
It could be Where do the Wicked Witches Live? by Juliet Snape and Charles Snape.
The Books for Keeps review is:
Dennis sets out to discover where witches live. As he searches over
the hills and beyond the trees, he doesn't know that wicked witches,
sleek cats and all manner of creepy creatures are observing him all
the way! Cleverly concealed in ...
Can it be Roald Dahl's Book of Ghost Stories?
Roald Dahl searched through various sources to find the bests ghost stories and made a book of short stories. There were a ghost ship and was released in 1983.