Useless and junk for children not over the age of three!...
Age Range: 8 and up
Grade Level: 3 - 4
Series: Science Matters: Simple Machines
Paperback: 24 pages
Publisher: Weigl Pub Inc (August 1, 2009)
Product Dimensions: 7.5 x 0.2 x 9.8 inches
Amazon Rank: 7246658
Format: PDF ePub TXT book
Discusses inclined planes, including how they work and how they help people, and examines their uses and history....