Put a perpetual motion machine on your desk. The Techno Balls 173 kit provides you with everything you need to construct a spiral marble run with a battery operated marble lift.
There are cogs, chains and rails to fiddle with to your heart's delight, and once the build is completed to your satisfaction, add batteries and watch the marbles run and run.
Hours of absorbing fun for techno-minded types. The completed Techno Balls 173 is approximately 30cm wide and 27cm high.
To operate the marble lifting motor, the Techno Balls 173 kit requires 2xAA batteries which are not included in the kit.
Suitable for ages 8+ with adult supervision.