Save up to 30% on select STEM Toys Posted on July 17, 2018 by Jeri Amazon is currently offering savings of up to 30% on select STEM Toys! Click here for this deal. Sample deals: TINKERTOY 30 Model Super Building Set (200 Piece): $25.98 K’NEX Thrill Rides – 3-in-1 Classic Amusement Park Building Set: $27.99 Cozmo: $149.99 Share the love: