Any suggestions for keeping a very active child amused and "still" for the next few days?

bathtub or other water play? can't be too active in there but there's still plenty of opportunity to splash around. baking together; reading together; making a blanket fort and setting him up in there with supplies; pulling out art supplies or legos; simple board games; blocks; puzzles; child-appropriate websites on the computer; ...

it's been a while since i've had a 4-year-old but there's a start, anyway.

Hi! I just a double take when I saw your avatar. Hope you're well :)

Things we did when my little one was in a cast... puzzles, legos/blocks, finger paint, drawing, stickers, baking, bath crayons, board games, and more movies than I would ordinarily ever allow.

coloring

play-doh

making stuff out of pipe cleaners

cutting and gluing stuff to paper

painting

writing his own story (with your help if needed) and illustrating it with pictures

Legos/Duplos

playing in the bathtub

playing in sand (you can make your own sand if you don't have a sandbox, with 8 parts whole wheat flour to 1 part vegetable oil)

puzzles

I'll get hate for this but it DOES work and more parents that would admit do this. Give him Benadryl. He will be drowsy enough to not need to bounce off the walls.

Nyquil...keep him drowsy all the time.