When can my child with osteogenesis imperfecta ride in a booster seat?
Use a booster seat after your child outgrows his car safety seat with a harness. This is usually when a child weighs about 40 pounds and is about 4 years old. A belt-positioning booster seat will lift up your child so the seat belt fits properly and will make your child safer in a crash. Never use a booster seat with a lap only seat belt.