Art is great way to have the children run their brains through a free hand visuals. Giving them a chance to draw, paint, or crafts is a great way to understand what is going on in their mind. A child might be sad and may draw sad face (he/she may not say it, but they are expressing it through art).
Kandinsky's Concentric Circles- a fun, easy project for any ages. I play a different type of music for each circle that I have the kids draw or paint. I talk to them about how color and strokes can show emotions. They always turn out awesome.