Solar energy projects for the evil genius / Gavin D.J. Harper, McGraw-Hill, 2007
This large format softcover book has some fun and easy project you can do in the back yard with your kids.
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Solar energy projects for the evil genius / Gavin D.J. Harper, McGraw-Hill, 2007
This large format softcover book has some fun and easy project you can do in the back yard with your kids.
