Supply List-Oil (I'm not sure if it matters which kind, but I used vegetable oil)
-Empty Plastic Bottle (I used Dasani bottles)
-Food Coloring
-Funnel (for pouring your liquids into the bottle)
-Alka Seltzer
- Pour 1/4 cup of water into an empty, clean watersoda/ bottle (if using a larger bottle you do not want the water to fill more than 1/4 of the bottle)
- Fill the rest of the water bottle up with oil
- Choose a food coloring color and put a couple drops into your bottle (we tried mixing and it turn out, maybe mixing it ahead of time could work)
- Break the Alka-Seltzer tablets into fourths, and drop 1/4 of the tablet into the bottle! After a few seconds I let the boys drop another 1/4 tablet into the bottle.
WARNINGS:- I didn't put more than 2- 1/4 pieces of Alka-Seltzer tablets (so 1/2 a tablet) into the bottle at a time.
- Do NOT put the bottle cap on the bottle if there is still a reaction going on in the bottle- the pressure will build up and cause the bottle to shoot the cap off or explode (I think, I didn't try this but I read this warning off of another blog so I didn't even attempt)
- Remember that you're using oil and food coloring so if this were to spill on clothes or carpet it would be highly staining!
We kept the bottle caps to save the project so they could show their parents later. I've heard that it will continue to react up to 15 Alka-Seltzer tablets.
This activity doesn't take up too much time, but it ended up being an all day activity. The boys wanted to wait for all of the oil to settle and set it all of all over again! It was fun for their parents to come home and the boys show their parents the lava lamps! Their parents loved them too!
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