Powerup 4.0 Smartphone Controlled Paper Airplane Kit: BlueThe PowerUp 4. 0 Smartphone Controlled Paper Airplane Kit takes the classic paper plane to a whole new level, letting you fly and steer your creation from your smartphone. Simply fold your favourite paper plane design, attach the electric engine, connect via your phone, and take control. With over 30 seconds of flying time from a single charge, it's a satisfying and repeatable experience for curious minds of all ages. The carbon fibre propeller shaft