Technic: Features a powerful pull-back motor, sturdy front bumper, large rear spoiler, wide black rims with low profile tires and an engine pop-out function, which is activated on impact. Check out the red, black and gray color scheme with cool racing stickers. Bring on the 42072 WHACK! and let the race begin. Activate the pull-back motor to launch the high-speed BASH! See the engine fly out of the vehicle body on impact. This LEGO Technic advanced building set is designed to provide an immersive and rewarding building experience. Combine with the 42072 WHACK! to create an awesome WHACK N BASH! combi model with two pop out engines! Suitable for ages 7-14. BASH! measures over 2" (7cm) high, 6" (17cm) long and 3" (9cm) wide. Combi model WHACK! N BASH! measures over 3" (9cm) high, 7" (20cm) long and 3" (10cm) wide.