Preschool STEM Activities - The Stem Laboratory STEM includes the subjects of science, technology, engineering, and math – subjects that are fun for kids of all ages. These STEM ideas are simple enough for preschoolers to try and offer tons of fun for pre-kinders. Try the activities one at a time with preschoolers at home or add the projects to your preschool STEM or science center. Amazon: stem kits for preschool wwwon›Search›stem kits for preschool1-16 of 573 results for "stem kits for preschool" Showing selected results. See all results for stem kits for preschool. Creative Games & Fun Activity. by Brickyard Building Blocks. $29 $ 29 95 $49 Prime. FREE Shipping on eligible orders. 4.7 out of 5 stars 531. Save $5 with coupon.