Hand throw/catapult/electric gliding three in one: Children can experience three power modes of "hand throw gliding - rubber band catapult - electric motor drive" successively, and intuitively understand the relationship between "thrust lift resistance". Contains 5 experimental cards to record the sliding distance at different wing angles and learn variable control methods. Patent mortise and tenon structure: The insert piece fits with the dovetail groove without the need for glue or screws, and the main assembly can be completed in 30 minutes without falling apart. Repeatable disassembly and assembly, cultivating spatial imagination and patience. One machine, two games ": During the day, hand roll gliding outdoors, at night, change to an electric base, and do indoor gliding races. Parents can challenge the farthest flight record together.