The seat belts and airbags in your car are designed to fit most people correctly. However, small children need a seat booster or booster cushion.
If you have an accident, or need to brake suddenly, seat belts ensure you stay safely in place. Young children are often too small for the belts to work properly. They can slip under the belt or get the seat belt against their neck. This is painful and dangerous. To make sure your child sits at the correct height, you can use a booster seat or booster cushion. These are suitable for children weighing more than 22kg and between 1.25m and 1.35m tall.
For smaller children, you need a child car seat.