When can you safely booster train?
My son is 4.5 (will be 5 in October), 44 pounds and 43 inches. We do a lot of carseat shuffle between my DH, myself and my oldest daughters car. Right now he is in a frontier and a prosport but I'm thinking of getting a booster for short trips to the store etc. is it too early? Is a really good car rider and listens pretty well. I'm just not sure if its a good idea yet.