And then I had a stroke of genius. Teach my kids hopscotch!
So I drew a simple hopscotch board (complete with numbers) and taught the kids how to play. Baby mostly just jumped up and down the squares, but Little caught on to dropping the rock, skipping it, and picking it up on his way back. It was a great activity to help with gross motor skills like jumping, standing on one leg, and bending over to pick things up.
An added benefit was learning the order of numbers, and my favorite – they were wiped out and completely ready for naps afterwards!