Ugears Stem 2-In-1 Arithmetic Kit Metal Earth A gift for kids aged

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Ugears Stem 2-In-1 Arithmetic Kit Metal Earth A gift for kids agedAddiator size: 21. 5*11*2. 3 cm Multiplier size: 24. 8*25. 5*4 cm Number of components: 117 Estimated time for assembly: 2. 5 hours UGEARS Arithmetic Kit, part of UGEARS STEM Lab collection, consists of two ready to assemble models: A Mechanical Addiator and a Mechanical Multiplier. Assemble the Arithmetic Kit and discover how the Mechanical Addiator and Mechanical Multiplier work. The model kit comes with a QR code to the study guide about the