If you feel lucky... you could quickly whip up some very basic horse shapes and stuff with beans or rice, six is a good number for a full bus, give them some racy names or quilty names.... Make up a little horse race ramble (can base it on quilting)..... and they're at the gate (machine) ...and we have so and so in front etc. etc. ... for someone to read & joke ... assign each horse a #... and a jockey (someone on the bus to cheer it on) Then pass around a sign up sheet with all the horse names on it... everyone puts their name on the horse they want to win .... ask for one FQ (or $1 or whatever) per bet and collect BEFORE race starts. Someone not participating throws the dice and if 4 is called then #4 horse gets moved one seat back... They all start at the "starting gate" and follow down one side of the bus & up the other (lots of cheering for the poor horse that hasn't made it from the starting gate) & the first horse to the front by the driver wins.... Everyone who backed that horse gets their portion of their winning.