The daycare I work at does this! Such a cool idea!! Make Your Own Ice Packs! Soak sponges in water (try the dollar stores!) and then freeze them in zip-top bags. That's all there is to it. As the water melts, the sponge reabsorbs it and holds it safely inside. Totally cool right?
Fun memory game..popsicles. I used this idea for a Christmas gift for my 3 year old niece although I didn't use popsicle shapes. Just different scrapbook paper prints on one side and laminated with contact paper.