I can't stress enough how awesome this collection is. Fun and educational, with a vocabulary building 'parts' gallery on the back.
I wish the NYPL would get this entire series.
There are 10 total books.
Please order them all! :)
Amazing Machines
http://www.amazon.com/gp/aw/d/0753461544/ref=pd_aw_sbs_14_1?refRID=0PKQCC2CSAQAPC06VJ65#
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Tough Trucks