These medium-sized round magnets are strong enough to stick together through a table (one on top and one on bottom). They sell well for Matt Hannifin, manager at Science Toy Magic LLC in Santa Fe, N.M.

This eco-friendly clock can accurately tell the time and date using only liquid power. The clock can be powered using anything from water to soda to beer. Launch date: 2007.

The magic of the Color Lab Mixer is in its three scientifically designed chambers. Kids fill the two side-by-side chambers with water, and then add a different Color Splash™ Tablet to each chamber. When they carefully tip the Color Lab Mixer, the two colors spill into the front chamber, creating a third color. The toy includes color wheels, a mixing diagram and 24 assorted Color Splash Tablets. The Color Lab Mixer demonstrates the magic of color mixing, making bath time not only great fun, but a hands-on learning experience as well.
— Products by Damert are the best-selling bath toys at Fun Forest in Sumter, S.C., Manager Kim Anderson told TDmonthly.
— Anderson said they sell about one unit a week of bath products from Damert.
— According to damert.com, "We have more ways to color a bath than you can shake a rainbow at, plus paints and crayons to finish off the sides of the tub."