Here is what we do for my husband. He has adult children ages from 26-21; and three young grandsons. We have a nine year old daughter as well.
Because we don't see each other as often as we all like to, we like to make it a family affair. This year we are hosting a bbq and yard game affair. There will be horseshoes, batmonton (sp) water fights, etc. Something fun for everyone!
One year we had a picnic in the park.