Diy Lava Lamp With Alka Seltzer. The water/gas combo is less dense than the oil, so they rise to the top of the flask. Clear plastic bottle with cap;
Have your child drop in a piece and watch the magic (science) happen! Then we had some fun making lava lamps again. Fill the rest of the bottle with water (almost to the top but not overflowing).
This should have resulted in lots of rapid bubbling and an energetic lava lamp display.
Basic diy lava lamp directions. Try some funky science with our lava lamp experiment! I’d recommend making a few lava lamps and using a single color per lamp. Then fill about 1/4 more with water.