Babysitting activities?

So later on today, I'm babysitting a 4 year old (boy) and a 6 year old (girl) and I'm not really sure what to do with them. I'm watching them from 6-11:30 and I'm thinking they should be out around like 9:30-10 the latest (I guess we'll see). So while they're up, what should I do with them?

Tulip2015-06-13T08:46:46Z

They will no doubt do whatever they normally do.