We are getting a car for the first time in my adult life (I'm in my late 30s!) and I'm clueless. What kinds of supplies/emergency kit do you keep in your car? Some details: the car will only be driven on weekends, I personally will never drive it, it will be kept in a secure garage, and the weather is tropical, so I can't store anything that would be sensitive to heat like medication. FWIW, my LOs are 4 and 7.

Alternately, do you keep some kind of grab bag that you keep at home but take with you in the car, especially for slightly longer or all day outings?