This is an unopened Lego Technic. My son received two for Christmas so we are selling one. Description from LEGO: Looking for the ultimate gift for a child or teen who loves supercar toys? This LEGO Technic McLaren Senna GTR (42123) toy car building set is a great choice – this collectable model car kit is sure to set pulses racing, and adult McLaren fans will love it too! The LEGO sports car is packed with authentic features inspired by the original track-focused supercar icon. Realistic details and powerful functions make sure the McLaren Senna GTR is a car unlike any other, and this awesome LEGO Technic toy version is equally impressive. Check out the V8 engine with moving pistons, iconic dihedral doors that open, plus authentic graphics and colors, just like on the real car. Steer using the wheel, then put the model on display where it’s sure to draw many admiring glances. LEGO Technic model car building kits feature realistic movement and mechanisms that introduce LEGO builders to the universe of engineering in an approachable and realistic way. They make a fantastic birthday present or Christmas gift for 10 + years old fans of LEGO sports cars. Measures over 3 in. (9 cm) high, 12 in. (32 cm) long and 4 in. (12 cm) wide. Contains 830 pieces.