I came across this website called Announcing It when I was looking for birthday invitations. They have tons of kids’ invitations that you can have printed, or you can order them blank. I love the section of invitations that are personalized to your birthday theme. You can find invitations for a tea party, firefighter party, pottery party, pirate party, beach party, ballerina party, outdoor jumping-tent party, and you get the picture.  Very cute!