Sewing with my boy

While I was sewing my boy came into my sewing room and wanted to do what I was doing. He saw the quilt I was working on and decided he was going to make a quilt for his baby brother coming in the fall. I pulled my fabric stash out and identified what fabric he could use. These are the ones he picked out:
I then handed him a pad of grid paper and explained that he needed to draw his design before we could start. He then used the entire paper edge to edge to draw a large flying dino in the center of the quilt: Then I had him color it to show where he wanted to use each fabric. I then measured the fabric to see how it would work out and then redrew his design (only changing it a tiny bit to make it a little more clear) until it looked like this:

We have it almost all cut out (not the big dino yet) and he's super excited to get it done. He is so creative he even suggested we use some green ribbon for the plants. I am now trying to figure out how to let him sew most of it without being a bossy perfectionist. Wish me luck.