In fact most of them time I prefer the images of the little ones playing and having fun.
Those candid moments when they are relaxed and enjoying themselves are often the ones that really capture their personality.
So, don't worry if you think your child won't have the patience, I do! I'll take the time to set them up to enjoy themselves. You will have pictures of your children as they are and as you will remember them.
P.S. Bring toys!