Once I started as a videographer and photographer I used to create scripts for my sessions, and it quite worked when we talk about about maternity or couple's photoshoot, but when you have a 2 years old little client it is a completely different story.
They won’t smile when you want it, they won’t go with mom or daddy when you want them to go.
At the beginning of a session sometimes they don’t even want to play with you, and that is ok.
It is just kids being kids and this natural behaviour is also lovely, it shows their personality and individuality.
With some patience, talking, and by observing what they seem to like, the sessions progressively became more fun and in the end, you have not only beautiful shots but also a new best friend.