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Includes genuine LEGO® elements
Base kit shows you how to build a mechanical calculator that adds and subtracts up to 100!
Additional parts provided so you can explore ideas for expanded design to see how much higher you can make it go!
Includes genuine LEGO® elements
Base kit shows you how to build a mechanical calculator that adds and subtracts up to 100!
Additional parts provided so you can explore ideas for expanded design to see how much higher you can make it go!