I have a great project to keep the kids busy. All you have to do is temper some chocolate (or you can cheat). The final outcome is a reward of it's own!
This is one I would definitely have them do at the table or outside. While they are at it, have them make you one...after all, it is Memorial Day weekend, right?
Find the instructions here: http://meaningfulmama.com/2012/06/day-182-chocolate-dipped-ice-cream.html