A great way to help kids learn their colors and body parts is have them go on a color hunt using different parts of their body. Some examples:
"Put your head on something yellow."
"Put you elbow on something white."
You can also do this with shapes and letters and body parts (i.e. Put you knee on a square. Put your finger on letter M).
It's a great kinesthetic activity to review colors, body parts, shapes, letters, etc.