Send the kids home with a facemask, test tubes, green slime, goggles, magnifying glasses, magnets, etc. Alternatively, send them home with test tubes filled with candy like M&Ms.Lisa Kothari is the founder and president of Peppers and Pollywogs, a kids' party planning company that provides parents with ideas, entertainers, and interesting web-based tools (customized rhymes and cards for your invitations!) to make kids' party planning easy.