With regards to pricing of additional extras on the day, the pricing of these is set and controlled by the supplier at the venue, and are sold independently to the experience package sold through our website as the acting agency. These are an additional stream of income for them that we have no involvement in, so the pricing will be within their arbitration.
That said, we will pass your feedback onto the supplier to make them aware of this, as we believe this would be beneficial to improving the experience in future. We're pleased your son still enjoyed the cars he got to drive though, and we hope you will consider us again to book another experience with.