Rainbow Bubble Snakes. Review- these are awesome! We did ours without the food coloring. Toddler +food coloring= a clean up i do NOT wanna do! But these were so easy to do and little man had a blast chasing the bubble snakes! All you need in a plastic bottle with the bottom cut out, dish soap and water in a plate or bowl, an old thick gym sock or old terry washcloth, rubber bands (i used old hair ties!)and some food coloring to drop onto the sock (optional). So easy!