Adult owner only. I put the set together and then put it back in the box in order. I put each piece in its correct bag and numbered each of them. All pieces including instructions are there. Box does have quite a bit of wear. See photos. Inspire kids aged 9 and up to build their own race car model with this LEGO® Technic™ Bugatti Bolide (42151) toy set. They’ll enjoy a challenging project as they craft all the true-to-life details, including a working W16 engine, steering and scissor doors. The car’s stunning looks steal the show, with a yellow and black color scheme and authentic sticker details. After building and exploring the car, kids can display their collectible model with pride. A great introduction to engineering LEGO Technic buildable model sets feature realistic movement and mechanisms that introduce young LEGO builders to the universe of engineering in an approachable and realistic way. Let the LEGO Builder app guide you and your child on an easy and intuitive building adventure. Zoom in and rotate models in 3D, save sets and track your progress. A build for motorsport fans – Give race car enthusiasts aged 9+ a building challenge to remember as they assemble all the details of the LEGO® Technic™ Bugatti Bolide (42151) model set Check out the details – Kids can build and explore the working W16 engine, steering and scissor doors of this Bugatti racing car model