Battery Science Make Widgets That Work and Gadgets That Go, $19.95

Building Cards Hogwarts School of Witchcraft and Wizardry, $19.95

Building Cards How to Build Castles, $12.95 sale $10.36

Building Cards How to Build Castles - extra deck of cards, $7.95

Building Cards How to Build Pirate Ships, $12.95

Building Cards How to Build Spaceships, $12.95 sale $10.36

Castle A fold-out kingdom, $16.95

LEGO Crazy Action Contraptions A LEGO Inventions Book, $19.95

The Best Paper Airplanes You'll Ever Fly A Klutz Guide, $4.95

The Klutz Book of Paper Airplanes, $16.95

The Solar Car Book, $21.95