I really don't put a lot of emphasis on drawing ability for this center. It's more about their ability to read text, make a picture in their minds of what they are reading and then communicate that visualization through drawing. While teaching this center, I tell them to first read it all the way through. Then I reread it and model the process of stopping to visualize. I think out loud so my students know what's going through my head while I read. When I finished reading, I start to draw. When I'm finished drawing, I reread a third time to check my drawing.
Here are a few examples of this center:
A pond scene:
It can also be a great cross-curricular activity. I made one to go along with our rainforest unit. I had pictures of the animals available as a resource to them. They love learning about rainforest animals so they often take extra pride in this one. :)
I always have a blank one available for read-alouds. You never know when you will come across a great opportunity to practice visualizing! When we were reading a fairy tale, the author described what the character looked like. It was the perfect time to whip this out. :)