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 fizz! Infant Activities, Preschool Activities, Activities For 2 Year Olds Indoor, Preschool Art, Winter Activities, Toddler Play, Toddler Crafts, Projects For Kids, Crafts For Kids