$32.99 Simple Machines STEM Activity Set $32.99 Add to cart Add to Wishlist Quick view Add to Compare
$24.99 Simple Machines Inclined Plane $24.99 Add to cart Add to Wishlist Quick view Add to Compare
$39.99 Simple Machines Gear Train $39.99 Add to cart Add to Wishlist Quick view Add to Compare
$24.99 Simple Machines Block & Tackle $24.99 Add to cart Add to Wishlist Quick view Add to Compare
$14.99 STEM Starters: Zip-Line Racers $14.99 Add to cart Add to Wishlist Quick view Add to Compare
$14.99 STEM Starters: Paper Circuits $14.99 Add to cart Add to Wishlist Quick view Add to Compare
$14.99 STEM Starters: Hydraulics $14.99 Add to cart Add to Wishlist Quick view Add to Compare
$14.99 STEM Starters: DIY Fidget Kit $14.99 Add to cart Add to Wishlist Quick view Add to Compare