You can make rag quilts out of remnants of fleece, just sew 2 squares together, you don't need the extra center piece, it's heavy enough.
You can also make covers for your hangers with it - adult or children. They will keep your clothes from slipping off the hangers.
You can also make "patchwork" scarves, "butting" the seams together and sewing with a zig zag or decorative stitch.
You can also make a rug out of fleece by braiding pieces together.
There are free patterns for fleece socks, hats, scarves on the internet, as well as the rug pattern.
If you can't find something, and would like copies of patterns, just PM me. I can give you the sites but I also know some of the patterns I've downloaded over the years are no longer available and I would be happy to send you copies of what I have.