Chaos has been unleashed! Young gaming fans ages 8 years old and up can build epic Sonic adventures with the LEGO Sonic the Hedgehog Knuckles vs. Dr. Eggman Egg Crusher Mech (77005) building set. This action-packed Sonic toy brings the high-speed world of gaming to life as kids construct Dr. Eggman's massive mechanical destroyer, complete with an opening cockpit, a giant spinning claw, a rotating 6-stud launcher, and articulated limbs for maximum battle action. The power of Angel Island comes to life as Knuckles the Echidna prepares to defend his territory using his signature gliding skills and the included hoverboard for aerial attacks. Kids can stage epic showdowns between these iconic Sonic characters while launching boulders from the catapult with terrain using a lever push, and collecting three precious Gold Rings and two Chaos Emeralds scattered throughout the battlefield. This thrilling building toy adventure includes minifigures of Knuckles and Dr. Eggman, and lets young gamers recreate their favorite Sonic the Hedgehog game moments or invent brand-new speed-fueled stories with endless action possibilities. Makes an exciting birthday gift for boys and girls who love gaming action, building toys, and pretend play adventures that bring their favorite video game characters to life. For more building fun, other LEGO Sonic the Hedgehog sets (each set sold separately) can expand the gaming universe, while the LEGO Builder app provides enhanced digital building guidance and 3D viewing tools. Contains 350 pieces.