The way we do birthday parties is:
They schedule a time that does not conflict with racing, etc.
We charge $7 per child. We give them 2 hours of supervised riding time on the track. We have helmets and the before mentioned bikes they can use. Same safety rules apply, must have helmet, etc.
We give the birthday child a BMX trophy that has the date, their name, age, etc. We make a big deal about the trophy and call the birthday kid to the tower. We also have bags we give out that includes a copy of BT, a track flyer and some candy to each of the kids. We also give them a hotdog and potato chip lunch. The party is responsible for their own cake and ice cream.
We don't make a lot of money doing this, but it brings more exposure to the track. The $7 does cover the cost of the hotdogs, chips, trophy and candy easily.
We require that the birthday child be 8 or older and that all kids who attend have a waiver form signed by their parents.
For more info, you can check our website at www.columbiabmx.com
and click on the "birthday party" link on the top left.