Keva: Contraptions Reactions Slime & Putty Discover the mesmerizing flow of

Discover the mesmerizing flow of immiscible liquids with the Science Museum of Minnesota Oil Timer

Vintage-style tote bag made from 100% natural cotton with interior pocket

Holds a generous 15 oz of your favorite hot or cold beverage

This Insects 20 oz Mega Mug is covered in detailed illustrations of beetles

making it a delightful keepsake or gift for dinosaur fans

Keva: Contraptions Reactions Slime & Putty Discover the mesmerizing flow ofGet the fun rolling with this unique set that includes traditional KEVA planks, special colored planks and a variety of unique pieces to set off chain reactions. Builders can set up their contraptions to cause reactions like ringing a bell, knocking over a bowling pin and more. Build a course and see if the pieces react as you predict!