|Fizz, Boom, FUN!|
Here is what you need to make your own:
zip seal sandwich bag
liquid watercolor paint or food colors
We didn't measure, but went hefty on the amount- the more you use for each bag the bigger the reaction between the active ingredients, and the bigger the explosion - See more at: http://www.growingajeweledrose.com/2013/05/play-recipe-sidewalk-chalk.html#sthash.Pk6o0sFD.dpuf
When ready, add baking soda bomb into bag, seal immediately, shake and place on ground. The bags will slowly expand and POP! The burst will create beautiful sidewalk art!