Rock climbing- For my 10th birthday I invited up to 15 people to go rock climbing at the nearest Rock climbing center. For my invitations I took gray ( or any color you would like) construction paper and wrote the Place, Time etc.... after I hot-glued little rocks all around the invitation . When it was dry I put it in a large envelope and sent it to all my friends. When everyone arrived at the rock climbing place we all sat down and listen to the instructor which told us how to lock the chains and climb up and down etc.. We picked partners out of a hat so no ones feelings would get hurt. When the party was finished we gave out the party favors..... For the party favors we made a clay balls and in the middle we put candy and prizes, then we let them dry and you just brake the rock by throwing it on the ground and it will brake and the prizes and treasures will fall out!! The party was a blast!!!