Day 43 of my 365 Project. Wasn't sure if I wanted to do this or not. I don't really like the idea of being 'forced' to take a photo everyday, but I'm still enjoying it! As you can tell, my subject of my 365 Project is my son, Tharin. Most of the time he cooperates. I don't normally ask him to do anything, but instead, capture what he's doing at the time. There have been so many times he's been doing something really cute of funny, only to finish a second before I get my camera. Pretty sure he does it on purpose and is silently laughing to himself.
The best way to get a bad picture of your kid (or kids) is to pose them or ask them to do something. They will never do what you want, trust me. With smaller children, just following them around a bit and snap away while they're doing something they enjoy. That's when you'll get the really natural, beautiful ones. From time to time, I do ask Tharin to 'pose', but it's more like maneuvering him into a different place or position. Just talk to them to get them to look at the camera. I usually use, "OH MY GOD!! Did you just see that leprechaun??" Dirty, I know, but it works. And yes, I do on occasion plead, "Please, please, please look at the camera." Nine times out of ten, it doesn't work.
With older children, it's a little different. I still do the same and take photos when they're doing something they enjoy but older kids can feel a little more self conscious. Sometimes they need and want some direction. Tell them they're doing wonderful and look great! Who doesn't like to hear that? Other times, I tell them to just ignore me, or at least try or pretend to ignore me. You'd be surprised how well it works.