4M Tin Can Calculator</br></br>Product Description</br></br>Create green energy by making your own batteries using recycled soda cans and pencils.;This set teaches you the science of creating electricity in a fun hands on experiment. Your assembled tin can battery generates enough juice to power the included calculator for hours.;Made using safe and high quality materials?? this product is designed to last.;Give the gift of science with toys and gadgets that foster curiosity and encourage scientific learning.;R