I hired an actor to dress as spiderman. He came and dressed in our garage, and then climbed up onto our roof and jumped down onto the deck outside the party room. When this happened, all the kids screamed in excitement and ran out onto the deck. Spiderman greeted my son and wished him happy birthday.  He took them out into the yard, and did superhero training that we had planned out before hand. He did web slinging practice. I purchased each child a can of silly string, and he set up targets for them to shoot at. This was a little hard, as some of the kids could not push the button hard enough to shoot the string. Spiderman then did wrestling practice. I purchased inflatables of spiderman, hulk, and wolverine that were each about three feet tall and the children wrestled with them while Spiderman game them tips. Then he led them through the yard in a obstical course. The actor was great with the children.