Whilst browsing through blogs, I came across Summer Fun Jars.
She has one jar each for Let's Do, Let's Go and Let's Eat and each jar has a load of things inside. Each week they pick something out of each jar to do/make/eat that week. I think the Eat jar is baking ideas or recipes to try rather than a week's menu :)
If you are struggling with children who are bored and/or constantly badgering you for something to do, this may be a sanity saving idea. I can see it working outside holiday time too.