This Mechanical Gears project by Robotime lets you piece together a plywood Air Vehicle Model that moves with its very own gear drive! Pre-cut using state of the art laser-cutting technology, each piece of the puzzle is easy to remove from the flat-packed sheets of plywood. The pieces are all numbered for your convenience, and go together smoothly as you consult the illustrated step-by-step instructions! You won't need glue to assemble your model thanks to the ingenious interlocking design, but you'll require some patience and a steady hand. Even beginner model makers can tackle this Robotime model with wind-up gear unit and spring drive Watch it propel forwards with it's spinning propeller and moving gears as you turn the clockwork key. This family-friendly project is perfect for teens and young adults to nurture creativity and woodworking skills. Includes: 229 pre-cut plywood pieces and the pieces to make a wind-up gear unit and spring drive. Recommended for ages 14 and up. Estimated assembly time: 5-8 hours (rated 4 out of 5 for difficulty).