M MerriDee C Guest Feb 23, 2009 #1 My 5th grade son needs to use minimum 3 simple machines to build a complex machine that helps people. I have no idea what to do, we know the parts but I am lost. Can anyone give a detailed idea?
My 5th grade son needs to use minimum 3 simple machines to build a complex machine that helps people. I have no idea what to do, we know the parts but I am lost. Can anyone give a detailed idea?
