Gyro Wheel Color:Red A counting ring on top

A counting ring on top enables you to keep a running total right on the gauge

Educational construction set

air pressure and humidity in descending dials

43cm long when built

25 cm H by 21 W x 6 D

Gyro Wheel Color:Red A counting ring on topEveryone will want try it , it's so impressive and easy but for the really skillful there's an extra skill level. Hold the wire guides vertical , with magnets on disc inside the rails. Basically you spin a (magnetised, flashing) disc on wire guide rails but there's a knack to it. (Start off slow, speed up once the disc is spinning and flashing). The faster you go the more dramatic the colour display. Adults will demand a turn too! (Great entertainment