22 month old LOVES drawing - I’m looking for ideas on how to somehow contain him in one spot where he can draw freely but won’t be drawing on walls, floors, etc.

I’m sure there are simple solutions for this but I can’t figure out how to go about it — he’s extremely active, so just sticking him in a giant box likely won’t contain him for very long lol I mean maybe like a couch sized box or something but we don’t have one at the moment.

The two biggest issues are: - he’s super active and it’s difficult to keep him in a designated spot - he WILL for sure be sticking crayons in his mouth

He has an LCD drawing pad and two magnetic drawing pads that he is constantly using, but I’d just love to let him go crazy with some crayons in a controlled-ish way.

Any ideas welcome :) thanks so much