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Discover how these mechanisms are crucial elements of many machines even though they are not considered as “Simple Machines”
trains and more
This Build-It-Yourself robot will keep flipping as its centre of gravity changes
Build more than 30 kinds of detectors and alarm systems
hearts and more
4M - Crystal Growing - Magical Unicorn Crystal Terrarium Glow Discover how these mechanisms areCreate your very own magical crystal unicorn world with 4M Crystal Growing Magical Crystal Terrarium. The kit includes 2 unicorn toys and a transparent unicorn sticker which can be added to the terrarium to make it a unicorn paradise. Instructions are included and will guide the kids to create a magical Unicorn Terrarium and they can grow 4 colorful crystals. Kids can watch their crystals grow like magic over 4 7 days. It is a wonderful creative
US$ 57.95
US$ 89.00
US$ 13000000.00
US$ 2650000.00
