Not all bubbles are made with soap!
http://www.exploratorium.edu/science_explorer/balloon_blowup.html
Make an observatory to see the amazing colors in bubbles!
http://www.exploratorium.edu/science_explorer/bub_dome.html
Since oil floats on top of water, you might have thought that oil would float on top of alcohol, too. But the oil sinks to the bottom and the alcohol floats on top of the oil. Even though water and alcohol are both clear liquids, they have different densities.
http://www.exploratorium.edu/science_explorer/glitter.html
Spin the bottle to make beautiful swirling shapes!
http://www.exploratorium.edu/science_explorer/goflow.html
Ketchup, like Ooze, is a non-Newtonian fluid. Physicists say that the best way to get ketchup to flow is to turn the bottle over and be patient. Smacking the bottom of the bottle actually slows the ketchup down!
http://www.exploratorium.edu/science_explorer/ooze.html
Oil floats on water because a drop of oil is lighter than a drop of water the same size. Another way of saying this is to say that water is denser than oil. Density is a measurement of how much a given volume of something weighs.
http://www.exploratorium.edu/science_explorer/volcano.html
Do hot water and cold water mix ?
http://www.exploratorium.edu/science_explorer/watertrick.html