Summer vacation will be here soon, and I am looking for resources. DD10 and DD11 will be taking fun sports classes, Chinese (which they love), and swimming. All these classes ended up in the evening or late afternoon. So, besides hanging out at the pool and having as many play dates as possible, I was wondering if there are some fun online classes they could take. I will not survive the summer if we have too much down time (sibling rivalry might do me in). I have looked at our local city parks and rec sites and other organizations, but they are all doing camps which I don't want (for financial and time purposes). Duke Tip has some fun classes, but the description states they last 6 month or longer. Any ideas? DD10 loves science. She is currently doing the Khan Academy programming class for fun (addicted might be the more accurate state of mind) while DD11 takes an evening math class.