Children will watch in amazement as this powder mixes with water and expands to make a coloured, thick goo.

Gelli Baff is one of our most popular resources for exploring messy play or investigating materials, and it isn't hard to see why. Easy to mix, quick to form goo and most importantly, really easy to clean up after play.

The powder soaks up to 400 times its weight in water. When the fun is over, simply add the dissolver sachet to the goo and watch as it turns back to water.

Available in 300g packs of assorted colours or now 1kg tubs for practitioners wanting a little more.

For ages 5yrs+.

For use in Early Years establishments, use under adult supervision after appropriate risk assessments have been carried out.