Lori has some great fonts and files that work great as stamps.
I used this Unicorn from the Shop or Sihouette Store. And I used the LW Dreamy Font: Silhouette Store, Lori's Shop.
You stamp several times to get rid of the excess ink, then it's ready to stamp for 50 applications! The unicorn design is great for using multiple colors. You see how the colors blend into each other to make a nice rainbow effect. My niece is going to love the stamp!