$500.00 ? I use my grandson's booster seat. With the seat forward he can reach the rudders and have full control of the yoke with his seat belt fastened.
The seat that is being sold fits in the cargo area. You could carry your grandson in the booster seat plus a child in the rear seat up to 100 lbs. Useful if you need it. For me on many occasions it has been the difference between getting to fly to our destination with my bride and child in tow, or driving.
