Who needs a baseball-throwing arm to win a paper airplane contest? The lucky kid, or kid-at-heart, who finds the PowerUp 2.0 Electric Paper Airplane Conversion Kit, in his Christmas stocking won’t be able to stop folding and flying paper airplanes. Guard your paper supply! With the PowerUp module, paper airplanes sail, soar, swoop and glide effortlessly. The sturdy module is built to withstand dives and drops, and requires 3-AA batteries (not included). Available from Amazon; $16.