Country supply (horse.com) catalogue had Headstall charms for $5 each or 2/$4 each...they were really cute. I saw some pink riding gloves for $6.25 a pair a little less when you but 2 or more. Ummmm.... Seems to me like they have butt glitter and stencils for your horse for a reasonable price too.
Are you wanting horsie or non-horsie gifts for the girls???