In a collection of short sci-fi stories, I read one where two sibling hated their parents always being away on scientific expeditions to other planets. One day, they decided to stow away on their parents ship, and end up landing on a planet where the foliage is huge and very fast growing. Of course, they wander off and get lost, while their parents are not only realizing that the children are now on the planet, but trying to prevent their ship becoming too overgrown to leave.
The children struggle to make their way through the dense forest, and they end up discovering that the rocks are not only sentient, but can gently 'bounce/glide' along, and teach the children how to do so. This naturally makes it much easier for them to get back to the ship. I also recall that the kids managed to carry water in hollow logs or plants of some kind by stuffing moss or mud in the ends as stoppers.
On returning home, the children don't mind their parents going away so much anymore because they are able to amuse themselves (and their friends) by demonstrating the bouncing technique taught to them by the rocks.