Forget pin the tail on the donkey -- let your imagination run wild when planning games and other activities for your child's princess party! Have children sift for plastic gems in a sandbox, or supply the necessary decorations for each child to design and create a tiara fit for an imaginary queen. If you can swing it financially, arrange for pony rides in your backyard (a white stallion might be a tad too ambitious).
Whatever you arrange for playtime, keep the games creative, fun and affordable. Children have impressively short attention spans and will lose interest if you plan too many organized activities.