posted by Gina
Age Range: 5 and up.
This is a nifty (dare we say groovy?) experiment that kept Larry the Cat amused for several hours today – ensuring its success with your kiddo.
You Will Need:

- An empty bottle – those schmancy designer water bottles work well (as do empty – erm – adult bottles, as pictured above), but any empty, clear bottle will work just fine
- Oil
- Water
- Food coloring
- Alka-Seltzer tablets