Nobody actually says–or at least nobody actually gets to say–that just because you’re a “grown up” now, you have to stick to the sidewalk.
Hop up on the wall, if it’s calling your name, and teeter your way along in the sky above the sidewalk for a while.
Or abandon the sidewalk entirely and crunch through the leaves as you venture into the woods.
You are still human. There is still wonder. You are still free, child.