We did cookie decorating for my daughter's birthday party. I taught them how to marble a cookie and they loved it! If you like, you can have mom pipe the lines and let the kids drag the toothpick through. This is a fun and easy project, and the results are instantaneous and mesmerizing! You can also pipe a bunch of transfers in advance for the little ones to place on an already flooded and dried cookie (I used flowers for my project). Just stick them on with RI and you're ready to go. And transfers are much tidier than sprinkles!