Tricks (ABC Science) Tricks Blow underwater bubble rings Everybody loves bubbles and we're all mystified by the swirls of a vortex. Combine the two and you've got yourself the coolest trick under the sea. Banana 'candle' trick This classic prank will appeal to anyone with a penchant for plantains but don't be fooled! Explore more Tricks Dry footprints on wet sand Why do your footprints look dry when you step on wet sand? Salt experiment How and why does water mix in our oceans? Cloud in a bottle Pump a soft drink bottle full of air, pop the top and bam! Doppler effect Swing a ringing phone inside a long sturdy sock and you will hear the strangely familiar Doppler effect. Swipe card experiment Sprinkle some iron filings on an old swipe card and pretty magnetic patterns appear right before your eyes. Unmixing experiment Can you unmix a mixed-up liquid? Coin experiment Master this impossible looking trick and you'll feel like a ninja Jedi master of the ever-expanding universe... or your money back!
Fountain experiment. Conundrums (ABC Science) Conundrums Hanging in water Is there a differerence between what something weighs normally and what it weighs in water? Taller or rounder? Which is greater: the circumference of a single soft drink can or the combined height of one lying on top of the other? Balloons on a hose Why are large bubbles so wobbly and smaller ones such perfect spheres? Cube conundrum Can you fold a strip of seven squares into a cube without cutting the paper? Explore more Conundrums Medicine mix up You've mixed up your expensive medicine.
Helium balloon in a car conundrum Accelerate and loose items shift to the rear of a car. Coin and paper conundrum Can you pass a 50 cent coin through a 10 cent coin-sized hole in a piece of paper without tearing the paper? Secret Problem Sam needs to send Sally a secret inside a padlocked metal box. Exactly half? You have a perfectly cylindrical glass filled with water. Think outside the box Can you connect all nine dots by drawing four straight lines without lifting your pencil?
How to Make a Lava Lamp the Easy Way. Alka-Seltzer Original Antacid Effervescent Tablets 72. Make a Lava Lamp.