No, I don't think that's it, although it looks interesting in its own right. The whole premise of the book is the kid trouncing around, jumping through hoops (rings) and having all sorts of adventures.
Hi all! I need help, and the patriarchal Google has let me down. I read a sci-fi novel in the 90s (I think) about a young adult who travels between worlds via colored hoops/rings. Some of them are visible to the general population, but he can see some that are invisible to most.
He jumps...