399 piece stem simple machines base set homeschool educational building blocks lego style compatible Colour:399Pcs No Box Product Dimensions: CH038A - 20cm
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Description
399 piece stem simple machines base set homeschool educational building blocks lego style compatible Colour:399Pcs No Box Product Dimensions: CH038A 20cm Product Dimensions: CH038A 20cm x 4cm x 11cm Variable 25x–75x magnification with a central focus system makes it easy to zoom in on distant subjects