Glad Monster, Sad Monster by Ed Emberly- Comes with different happy and sad masks in the back. Invite a few audience participants to come up and hold the appropriate masks in front of their face while you are reading the story.
Grumpy Bird by Jeremy Tankard- Super cute and funny. Bird wakes up grumpy and goes for a walk. As he travels more animals join him.
How Kind! by Mary Murphy- A very elemental lesson in Karma! One good deed leads to another until the book comes full circle at the end. A short read.