STEM science for kids ages 7 to 12. Grow your child's mind through Science, Technology, Engineering and Math. Winner of the Parents' Choice Award for Subscription Boxes. Winner of STEM Toy Expert "Best for Family Projects" subscription box. Receive a different STEM Discovery Box in the mail every month! Each box includes THREE STEM projects/experiments! Electronics, physics, chemistry, coding, hydraulics and more in fun, age-appropriate activities.