This was a weekly two pages in a UK comic in the late 1960's/early 1970's, I can't recall the comic....Victor Hotspur Rover Topper Beezer etc, I read them all.
This schoolboy either invented or inherited from a scientist relation a time machine, every few weeks there was a new story arc so he'd be with Egyptians building pyramids or Ancient Greeks attacking Troy yada yada. (I can't remember how he got the languages but it works for Dr Who)
The story that sticks in my mind was he emerged from his little capsule and there was people somewhat like Aztecs slaving away making the famous Easter Island statues "for the Masters"
They were due a Master visit so he hides to observe, then a flying saucer lands and they emerge, they are aliens that look exactly like the statues!
I can't remember the reason they wanted these statues made, I recall the schoolboy organised a slave rebellion, little skirmishes and sabotage and eventually the odd looking aliens left our planet...then the next story arc began