This is a Mattel Hot Wheels Brickin' Delivery Car which can be used with Mega Bloks. From the Brick Rides series, vehicle 3 out of 5 on long card.
Vehicle can be pulled apart into 3 parts and designed to be used with Mattel Mega Bloks (which is their version of Lego).
Appriximately 6.5cm long and 3cm high.