Aside from that... pain makes us lose intellect, and we're all hit, so I guess I should type the most simple thing. Extreme temperatures can be harmful. If you plan on leaving a child or a pet in a car, leave it running and turn on the air conditioner while you shop.

A child isn't tall enough to reach the pedals, but even if they decide to play in it, you can shift gears into something that won't move the car if you have a stick shift.