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it's cool that the numbers disappear as you color
endearing button eyes
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This is a Roller Coaster Engineering STEM Kit that's produced by the good folks over at Thames And Kosmos
Thames And Kosmos Roller Coaster Engineering STEM Kit 105025 Then use the calculator toThis is a Roller Coaster Engineering STEM Kit that's produced by the good folks over at Thames And Kosmos. They make some of the neatest building sets on the market today. This set contains 330 pieces and includes educational material. Great introduction to design and science! Recommended Age: 8+ Condition: Brand New
