I would stitch in the ditch around each block. Outline the Pooh Bears along their outline so they pop out a bit. That is how I normally longarm the t shirt quilts that I have done. I don't like to quilt through shirts as it takes away from what they say, so quilt around them as much as possible while making it able to last for years and through many washings.
You did a great job!
Phyllis
QG