Amazing Science Kits: Snow in an Instant. Make artificial snow right at home! Watch it explode to 100 times its original size. Just add water! This kit contains one packet of snow powder, 1 measuring scoop, and an instruction sheet. Caution: D o not eat. Recommended for ages 8 and up. WARNING: CHOKING HAZARD- Small Parts. Not for children under 3 years. This set contains chemicals that may be harmful if misused. Adult supervision required.