These crazy(cute) boys of mine are not the best when it comes to taking a decent picture together. As I am sure goes for most 3 and 1 1/2 year old kids. The other day I tried to get at least one good picture of them both smiling and looking at the camera for their Grandma. I was kidding myself thinking I could actually get one quick. These are less then half of how many I had to take till I got one, ONE, decent smiling picture. But it was fun watching these two with each other and Max trying to help me keep Jack in the frame. And I did get a lot of good pictures in a different way ;).
So my suggestion for getting a good picture of your toddler; Take lot and lots of pictures and you might just get lucky. And bribes, bribes work too.