I did hear this entertaining conversation a few days ago...
Sibling: just pretend your leg is a caterpillar
Adam: 'kay, like this? *wriggles his toes and waves foot from side to side*
Sibling: I'll just make this nice and cozy. *sound of velcro, lots of velcro* Look! Now you're a pupa.
Adam: Yay. Yay! What's a pupa.
Sibling: It's a caterpillar's sleeping bag. Just wait. Be real still and then we'll take off the boot and your leg will be a butterfly!
Adam: I hope it's a blue one. Or green. Green is my favorite color.
Sibling: This is taking a long time. *sigh* Let's see if the toothbrushes will stick down in your boot too.
Adam: Mammmmmmmmmmmaaaaaaa!!
The other peeps are desperate to add his boot to their doctor kit. Think of the adventures they will have once that hits the rotation!