learning resources play foam glow-in-the-dark 4-pack. glow-in-the-dark play foam is the sensory sensation that never dries out. simply turn the light off and see your creations glow. this learning resources award winning product helps develop fine motor skills for little hands. the non-toxic formula makes this best selling play foam great for safe creative play. it doesn't stick to hands, clothes or carpet, just to itself. what's even better is because play foam never dries out, children can display their masterpieces rather than having to put it all back in the box. children simply mould play foam into anything in their imaginations before squashing it down and starting again. each pod measures 9. 5cm d. suitable for ages 3+.