Using these Hot Wheels cars is easy. Just place them on any smooth surface like a track or a flat table, and give them a gentle push to watch them zoom. For added fun, you can set up a DIY track with household items. When playing, make sure to keep them away from small children under 3 years old as there's a choking hazard. To maintain these cars, simply use a dry cloth to wipe off any dust or dirt. Store them in a dry place to prevent rusting. Since the packs are assorted, don't be disappointed if you don't get the exact style you wanted. You can always visit your local Toyworld store for more options.