These days, I've noticed that the most common theme for children's party apart from the Disney Princesses is Music or Rock Star Themed Party. Why not? There are lots of singing and dancing and kids can enjoy those types of party for they can join anytime. Hosts usually ask the kids to go in front of the stage to dance or sing with them just like what we have experienced when we went to some parties this year. I bet you it's a super fun party.
Rock Star party theme is so cool as well. If your kids love guitars then they can us those as props during the party. Just in case you are preparing for your kids' party soon, why not consider have a Music themed party and for sure kids will have a grand time.