No we don't hide the car keys. Maybe we would from a teen, hard to say yet. We do make sure the car is locked when parked/empty to preent death by heat stroke if a child climbs in to hide or play and can't figure out how to get back out (we also teach them to use the front doors to get out). This is a major risk where we live. A child would be dead in 10-20 mins here in summer,