Kids sleepover

My kids birthday is 1 month apart. My son will be turning 1 on the 26th and my daughter turns 3 August 27th . I’m having a sleep over with their cousins . It’ll be 8 kids . I need help on arts and crafts to do with them , so far I’ve came up with tie die shirts , s’mores(we have a bonfire type of grill in the back yard) and watch movies while doing the s’mores (projector on the garage) maybe buy some games like twister . and the girls can make bracelets. Anything else that wouldn’t hurt my pockets lol . Cause my daughter will also be starting preschool and I need to get school clothes for her . And to add in the kids are older than my kids . They’re all the age 7-9 years old . Only 2 out of the 8 kids are 1 & 2 years old