Klutz Book of Paper Airplanes

The Klutz Book of Paper Airplanes by Doug Stillinger aims to make itself the bane of fourth-grade teachers (though the spiralbound book's brief physics lessons should help win over some). The book gives instructions on 10 different paper airplanes, categorized by difficulty, and sidebars offer tips on troubleshooting, emphasizing the precision of creasing the folds, symmetry and making minor adjustments (called ""trimming""). A hefty packet of colorful paper, bound into the back cover, gives the concepts wings. (Apr.)