My ds is 4 1/2 and is in a dc in main car, regent in hubby's car, and dc in the car of the person who picks him up from school. He is 36.6 lbs and 42" tall. He has grown like 2 inches in the past couple of months. I am afraid that he is going to outgrow the dc before the end of the year, and I really don't want to buy 2 more HWH seats when he is only in Sheila's car a couple of blocks everyday. After this year, she will no longer be picking him up. He will ride the bus 2 blocks from his elementary school to the high school where I teach. We will probably get a regent when he outgrows the dc for my car, but what should I do for Sheila's car? I am concerned bc he is not 40 lbs, but at the rate he gains weight, it may be several years before he gets there. He was 35 lbs all last year...he is gaining about a lbs a year.