Mad Mattr is a super-soft modelling compound that moulds and shapes easily. Press it, mould it, knead it, stretch it, squeeze it, sculpt it - it's unique, non-toxic formula is casein and wheat free. Clean up is easy as it only sticks to itself. Don't worry if Mad Mattr is left out of the pouch as it never dries out. It is also perfect for building fine motor skills and has a natural calming effect.