We had a bunch of those over the years. Not that messy. Mae usually set them up on a table out of the way. She had a big roll of blue plastic tablecloth material for stuff like that. Just cut off a piece and let em have fun. If they mess it up it went in the trash. If not it was a quick wipe and re-useable.
I had Tiramisu the wife brought home from a diner stop for lunch yesterday.