Hot Wheels 20 Pack review. Classic Game Room presents a CGR Garage review of the HOT WHEELS 20 PACK from Mattel that contains 20 HotWheels cars! Start an instant Hot Wheels collection with a Hot Wheels 20 pack that has a wide assortment of Hot Wheels toy cars including real ones like Corvette and Porsche, and fake ones that they just make up with silly names!