Another pinner said "This kept my 2 year busy for an entire hour and my 4 year old busy for 2 hours! YAY! Drop vinegar tinted with food coloring onto a pan filled with baking soda. Sheer minutes of colorful fizzy fun!" Food Colors, Years Business, Drop Vinegar, Vinegar Tinted, Pan Filling, Food Coloring, Baking Sodas, Fine Motor, Colors Fizzies
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kiddie pool filled with shaving cream and food coloring on top to be mixed for messy messy fun! - so doing this this summer! Not sure about the food coloring, though...