How to Make an Easy Lava Lamp. What you'll need: Water A clear plastic bottle Vegetable oil Food coloring Alka-Seltzer (or other tablets that fizz) Instructions: Pour water into the plastic bottle until it is around one quarter full (you might want to use a funnel when filling the bottle so you don't spill anything).
Pour in vegetable oil until the bottle is nearly full. Wait until the oil and water have separated. Make gravity free water with a cup & cardboard. Use a Drinking Straw to Stab a Potato. What you'll need: Stiff plastic drinking straws A raw potato Instructions: Hold a plastic drinking straw by it sides (without covering the hole at the top) and try quickly stabbing the potato, what happens?
Repeat the experiment with a new straw but this time place your thumb over the top, covering the hole. What's happening? Make Quick Sand. What you'll need: 1 cup of maize cornflour Half a cup of water A large plastic container A spoon Instructions: This one is simple, just mix the cornflour and water thoroughly in the container to make your own instant quick sand. When showing other people how it works, stir slowly and drip the quick sand to show it is a liquid.
Stirring it quickly will make it hard and allow you to punch or poke it quickly (this works better if you do it fast rather than hard). Make a vinegar volcano with baking soda & vinegar. Blowing up balloons with lemon juice, baking soda & carbon dioxide.