^^^ Easy. You put them in the car and bring them to the event !
Coming along for the day on Sunday is just fine and dandy, its an open driving day with a HUGE course laid out with side-loops off to try the trials sections from Saturday if you want. There will be a bit flattish area coned off for parents to supervise kids having a shot. There are loos, food and the shop at the admin area. Basically come and drive, meet a few folk and enjoy, when the kids get bored just pack up and go home - unless you fancy helping pull in all the signs and markers !!
See you there.
G.