Many Moms will wonder if their children are ready to graduate from the 5 point harness system to actual booster seats system, and one of the easiest ways to tell is by looking at the sticker on your car seat and it gives you the height and the weight limits for that car seat. Another thing to take into consideration is how well your child sits in the car seat and will they stay in the booster seats without unbuckling the seat belt so you are looking at maturity levels as well. When you move to the booster seat there are two kinds. There's a high back booster or there's just the actual seat booster. The high back booster offers a little bit more support and especially for a smaller child so when you first transitioning to a booster seat I would recommend that you use the high back booster. It actually got a section on it that allows you to put the shoulder portion of the seat belt that it hooks right into that section, keeps it into right position in your child's chest. Just using the seat booster is probably better for an older child 8, 9 or 10 years old and that's because there already tall enough. There body's high enough and that's going to keep the lap portion of the belt in the proper position for them.