Games for Skype

My sis and I have introduced our kids to skype - her son is 7 and my son is 6. We are trying to find some things for them to do while they skype other than sit there and act silly or try to think of things to talk about. I was reading online that there were games on skype but then they updated and the games were taken away and you have to download an app which got bad reviews from where I was reading.

I'm just wondering if anyone here plays games on skype, what app you downloaded, are there games for boys this age etc.

Thanks!