- A stunning build for supercar fans, the LEGO Technic McLaren Senna GTR 42123 model building kit is packed with realistic details inspired by the iconic original. - Check out this supercar toy models authentic features, like the detailed V8 engine with moving pistons and dihedral doors that open up and out' in the unmistakable style of the real McLaren. - Enjoy steering the McLaren toy car using the wheel on top. - Model measures over 3 in. (9 cm) high, 12 in. (32 cm) long and 4 in. (12 cm) wide