This is the largest Solar Tube available today.

It is a whopping 18m long (60 ft) and 1.82 m in circumference! 

So warn the neighbourhood before your launch . . . 

Simply run and fill it with cool air, tie off the end and watch it gently lift into the cool morning air. As the sun heats the bag, the air expands and becomes less dense so the tube floats on 'denser' air.  

Included: tube, string & instructions with classroom extensions

Teach: Buoyancy, Archimedes' principle

Age: 8+ with adult assistance