Double Neon Wheel Liquid Timer
A fascinating timer that has a quirky flow of liquid beads through two spinning wheels. The density of the transparent base liquid is less than the neon-coloured drops, making for the interesting flow. Not only a lovely visual display, this entrancing timer demonstrates the mechanics of un-mixable liquids of different densities. A calming addition to the classroom, or great as a desk distraction at home or in the office.
Age: 8 +