Time for Some Fun with Disney!
Mickey and Minnie
My horse costume is Mickey and Minnie mouse. the rider is Minnie (if you are a girl) and the horse is Mickey. if you are a boy then you should be Mickey and your horse Minnie.
For your horse you will need black fabric or paper (paper works better), red fabric, yellow fabric, and yellow bell boots. For you, you will need a red dress with white polka dots, black show boots or field boots, white leotards, white gloves, and a bow. the red and yellow fabric is for Mickey's pants and the black paper or fabric is for his ears.