How Does That Work? by Ag156

How Does That Work?

the wheel the simplest of machines, a small cog turns quicker than a big cog, funny enough I just read with my middle son about 'how things work', the book he had chosen for tonight and of which we did two pages.
September 26th, 2017  
@overalvandaan it enriches children and parents.
September 27th, 2017  
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