Cheap Thrills — Lava “Lamp”

The rainy days of Spring are the perfect excuse to try some easy science experiments!!

For a little science fun, fill a small plastic bottle with water and vegetable oil leaving a few inches of space at the top of the bottle. Add a few drops of food coloring, then slowly add a few effervescent antacid tablets (aka Alka Seltzer)…..

…and watch your homemade lava “lamp” come to life!! Be sure to keep the bottle open.

In mind, was this segment from The 10! Show where Justin Pizzi visited the Delaware Children’s Museum. We love quick, easy, frugal projects like this!!

Have fun!!


  1. This is a great project. We did something similar (liquid fireworks) in a vase with just oil, water and food coloring. It’s very pretty.

  2. I bet she would love the tie-dyed milk experiment too! All you need is dish soap, food coloring, and milk! It’s sooo cool!

  3. What fun!! We will have to try this soon!

  4. Ooooo…seeing this science fun makes me feel GROOVY…

  5. We had quite a bit of fun with this one, too!

  6. Dear Valerie,

    Plop, plop, fizz, fizz. Oh, what a cool craft it is!


  7. We enjoyed this too! We also loved the tie-dyed milk experiment that someone else mentioned. So much fun!

  8. Sparkly!

  9. That’s a fun idea, who doesn’t like watching a lava lamp!