This is a very useful worksheet you will be able to use with young ESL learners for teaching and practising numbers, colors and classroom objects. I used this by playing "The Whisperer", you whisper a command in a student's ear (e.g. there are three yellow rulers) and he/she has to repeat it out loud for the rest of the class. Everybody has to follow this direction and count and color as it was said.
It can also be used in a more simple way, by just saying the students how to color the different objects.
Hope it is useful!