TULSA, Oklahoma - It is the largest mini-horse show in the world, and it's held right here in Tulsa at Expo Square. The creativity was evident as children and their horses dressed up in elegant costumes this weekend.

There was a Wizard of Oz theme - with ruby slippers and all. Bob Ross and his happy trees made an appearance as well.

There are two types of mini horses recognized. The "A" miniatures are up to 34 inches tall and the "B" horses can't come in any taller than 38 inches.

The American Miniature horse registry has about 10,000 horses registered, and this national show runs until September 16th.