Edible pearls - add a touch of peppermint essence when making them, perhaps, and they'd be lovely gifted in small draw-string bags (even though a tad labour-intensive, perhaps).
Homemade Ice Cream in a Bag. This is so much fun for kids. Make sure you use the heavy duty plastic storage bags. We used a little chocolate syrup. Turned out great. It reminds me of making snow ice cream.