STEM Discovery Boxes - 6 Month Subscription - 24 Projects! Unique science kits for kids ages 7 to teen. STEM focused: Science, Technology, Engineering and Math 6 MONTH SUBSCRIPTION Receive a different STEM Discovery Box in the mail EACH MONTH FOR 6 MONTHS! Includes a total of 24 exciting STEM activities (4 per box, 6 boxes) Neon Lamp, Color-Changing Worms, Erupting Snow, Instant Heat and 20 other STEM activities!