What comes to your mind, that can move? In a way, we can make almost anything moving.
Here is a tip for making things move with wheels
What can you find, that you can use as wheels?
Bottle lids for example.
To make your structures move with wheels, you need spinning axis. This sounds more difficult than it is. Just use paper, an old straw or anything that creates a hole for the stick to flip through it. Close with beeswax. And use the beeswax to connect your wheels.