The kids can still reap the benefits of writing in a thicker layer of sensory material, but it's harder to see what they've written that way. (fun-a-day.com)
-LSB-...] is another wonderful sensory material for little ones and you can make your own easily at home. (theimaginationtree.com)
Our little scientists will have a chance to explore different sensory materials, discover cause and effect and study science in a simple hands - on fashion. (kitchener-waterloo.momstown.ca)