Difficulty: ★☆☆☆☆ Play with kids in snow? Yes please! Taking kids to below zero temperatures? No thanks. Just add water to the scientific snow powder, watch...
Difficulty: ★★☆☆☆What's better than combining science and crafts? Add water to our scientific snowy sand, watch the powder grow immediately into mounds of soft, white artificial snow....
Difficulty: ★★★☆☆Less and less freshwater is available to us because of rising populations and increased pollution. Everyone on this planet should share the same water...