Summer Vacation Plans and Stories

[CRedskinsRule]

So,

In the Wow How late can you plan department. I have to come up with plans for my 12yo daughter and 13 yo son over the summer. The last few years they have come to work with me, and stayed upstairs, with various activities and day things to work around it for them and me. This year I found out that that won't work. Now I got nothing for them to do, and they can't stay home alone all day for a couple different reasons. Anyone got any saviour type tips to help me come up with a plan?

I have about three weeks to get something in place.