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.
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.