party games/ activities for six to 14 year olds?

Olive

Has anyone ever ran a party for children with a big age range? Avrage age is 11/12 but guests will range from 6 to 14 years old. Would be great if all could have fun! So if anyone has any creative ideas they could share either from when you were little or if you have run a children's party before I would appreciate it! Also most of the mothers plan to stay.