Expanding Spheres

Product Description

Amazing water spheres!  Pop these 3.3 mm rock-hard spheres in water and within hours you will have 20 mm jelly-like spheres!  That's a 220 times increase in volume! They contain 95% water so the clear spheres will be invisible in water.  

Add food colouring to the water to get different coloured spheres or purchase the pre-coloured ones that are colour fast. Leave them out of the water and they return to the original hard spheres.  Then expand them over and over. Bounce, roll or squeeze them or germinate seeds amongst them. Loads of gelled fun!

Included: 20 grams of 3.3 mm spheres (~500 spheres).
Teach: super absorbent polymers, gels, optical density, osmosis
Age: 6+ with adult supervision.

The files below contain more classroom information and the MSDS.

Safety: Made from non-toxic super absorbent material, these spheres can't expand in the stomach's acidic environment but due to the small size are NOT classified AS TOYS.  We recommend adult supervision.

Please select your preferred colour above.

See our Expanding Cubes too.