Using these die - cast Porsche Carrera GT models is easy. Just pull the car back gently on a flat surface and then let it go to see it race forward. When you want to check out the interior, simply open the doors. For safety, keep these toys away from small children who might put them in their mouths. Also, avoid dropping them from high places as it could damage the cars. To maintain them, you can use a soft, dry cloth to wipe off any dust. Don't use any harsh chemicals as they might damage the paint. Store them in a cool, dry place when not in use to keep them in good condition.