Things to do at a sleepover?

Ok so I have this big plan, my cousin and best friend are gonna spend the night for the summer and i need activities to do. We are all 11-12 girls. I already have some ideas. We may go camping and swimming. Plus I have a trampoline, and a snow cone maker. We have some activities like Truth or Dare , Would you Rather , and we are going to give each other blind makeovers and im getting a camcorder and we are going to record it. But we need more activities like games we can make up. PLEASE SAY SOMETHING LEGAL AND DONT SAY SOMETHING STUPID.......Thanks :)