I would sort it into piles for each child with fabrics that either from that child’s clothing or that fit that child’s personality.
if it is stretchy, i would interface it with a fusible stabilizer or interfacing. Then I would make each child a crazy quilt, and use all the fancy stitches on my machine to decorate the seams. No batting needed.
Use muslin or an old sheet for a foundation. Cut foundation fabrics the unfinished size for the desired block size.
Here is one of many tutorials available on the net.
https://youtu.be/l9QKruDO8tk
Press with a iron set no higher than poly.