Question: what are the weight requirements for a child booster seat?
Answer: Group 2: for children weighing 15 - 25 kgs (33 - 55 lbs), roughly 4 to 6 years. ... 
Groups 2 & 3: for children weighing 15 - 36 kg (33 - 79 lbs), roughly 4 to 11 years. ... 
Group 1, 2 & 3 Combination Seat for toddlers and children from 9 to 36 kg (20 - 79lbs), roughly from 9 months to 12 years.