Make a Homemade Lava Lamp!
A homemade lava lamp gives any room a retro flair! This educational science experiment teaches your child about water and oil properties through kitchen chemistry. Kids will learn something new, and get a mesmerising, colorful homemade lava lamp in the process.
What You Need:
- Empty and clean 16 oz. plastic soda bottle
- Soda bottle cap
- Vegetable oil
- Food coloring
- A large Alka-Seltzer tablet
- Flashlight (optional)
What You Do:
- Fill the bottle 3/4 full with vegetable oil. Add water to the remainder of the bottle, almost to the top but without it overflowing. Add 10 drops of food coloring, to make the solution appear fairly dark.
- Cut the Alka-Seltzer into 8 pieces. Drop one of the tiny pieces into the oil and water mixture. The mixture will start to bubble.
- Wait until the bubbling stops and add another piece of Alka-Seltzer. Continue until there is no more Alka-Seltzer, and the bubbling has completely stopped.
- Screw on the cap of the soda bottle. Tip the bottle back and forth and watch the wave appear.
The reason this homemade lava lamp works is because the tiny droplets of liquid join together to make one big lava like blob. Place a flashlight with a bright beam under the bottle to illuminate the bubbles for maximum visual effect.