This cute and colorful timer has two wheels that spin as droplets of neon colored water spill through a funnel and catch on the wheel in the lower chamber. Simultaneously, lighter drops of oil rise through the colorful water and spin a wheel in the upper chamber. Since the water is denser than the oil, it is forced through a funnel and down on to the paddles of the little wheel. A fun lesson in the density of liquids, this timer goes for about two minutes until you turn it over to start it again. Kids are fascinated by the properties of oil mixed with water and this makes an amusing gift that they can put on their desk and watch as the oil and water repel each other and spin the small wheels!
A combination of three of our great discovery toys, all in one package!
The large realistic model has removable organs that can be studied and set back into the correct position.
NEW 2016 DESIGN! This hip red tee features Pi to 1000 decimal places on an ultra soft 100% cotton shirt.
Discover how solar cells make electricity with this awesome kit!
Use this laser pointer for any professional presentation!
This kit allows to build up to 3 different robots!