Lava Lamp Bottles

 Things you need to make Lava Lamp Bottles:

• empty plastic bottles
• oil
• food coloring
• water
• alka-seltzer

 Fill the plastic bottle with oil about 3/4 of the way and the rest with water....you may want to leave a little room at the top just in case of bubbling over once the alka-seltzer is added.

 Add 10 drops of food coloring.

 Break the alka-seltzer tablets into about 5-8 pieces each.  Add them one at a time and watch the bubbles rise!  It's really cool!

 My boys had a ton of fun doing this and want to do it again!!  We saved our bottles so we could do it again when we have more alka-seltzer, lol!  We used a whole box today!