I have two teen/tweens and one 8 year old. So, far my plans for Spring Break include a living room campout; we will have hot dogs and pasta salad for dinner and makes S'mores in the microwave and sleep in the living room telling stories with flashlights and all that good stuff.
We will have a family Wii bowling tournament. The 8 year old is sure to kick everyone's butt in this.
Family Game Night; we will play cards, charades, and/or some board games.
We will probably hit the "cheap show" you know, the theater in town that has movies a few weeks away from their DVD release. It's usually only a few bucks to go.
Maybe we will go to the community pool (indoor, this is Michigan after all) and let them exhaust themselves swimming.
Great thread. I'm still looking for a few ideas so I look forward to more responses.