Engage Sonic fans with thrilling adventures thanks to the LEGO Sonic the Hedgehog 77005 Knuckles vs. Dr. Eggman Egg Crusher Mech Set. This cool Sonic playset works with other LEGO Sonic the Hedgehog sets in the range (each sold separately). Kids also get to experience an intuitive building adventure with the LEGO Builder app, where they can zoom in and rotate their models, save sets and track their progress.Any action-loving kid will be proud to own this gaming toy, which comes with a hands-on posable toy mech with an opening cockpit, rotating 6-stud launcher, a massive spinning claw and articulated limbs for interactive play. 2 characters, Knuckles and Dr. Eggman, are ready for role-play fun, plus, there's a hoverboard, a catapult toy with 2 boulders, 3 Gold Rings and 2 Chaos Emeralds.