My boys love anything with wheels. And if it's something they can do together - AND has wheels - it's golden in the Moose house.
So, we've made scooter boards. Pretty easy to make.
16 screws, no longer than the width of the scrap wood
Cut board to size. Square is ideal, but a perfect square just isn't necessary. We used an old scrap piece of laminate countertop. It's what we had handy.
Attach a caster in each corner using the screws.
You could paint or decoupage or decorate the heck out of this thing,. I would have if it weren't for the laminate countertop material.
My boys love to take turns sitting on the scooter and having the other push him around. It's a ton of fun.
Baby Moose (shown above) is wearing a helmet. It's not because helmets are necessary on these (although it's never a bad idea), but because he'd just gotten off a motorized vehicle that did require a helmet.
We often move the livingroom furniture around to create some sort of a racetrack or obstacle course. Then the boys each take a scooter board and race. It's perfect rainy day fun.