I have made a chenille and flannel quilt - twice! made baby sized one for grandson and then he told me it was too small so I made him a giant baby quilt! He is 9. He loves it.
Here is the thread with it:
Giant Baby Quilt update with photo
I made the seams a little bigger than a quarter inch. The other one is 9 years old and been washed a zillion times and has held together. Same fabric, same pattern, only more squares. Open seams and no iron. It makes a huge mess and I had to clean the bobbin case very often. I just ditch quilted it because that's what the pattern called for and he was happy with the first one. Very doable!!