Cute! What batting did you use? Each type gives a recommended minimum to spacing for your quilting. The 80/20 I use needs some quilting 4” apart. You could maybe tie in the centres of the blocks so it doesn’t go right over their artwork?
I googled “ how to tie a quilt for beginners” and there are a few youtubes on that technique. Here is one of them.
https://www.youtube.com/watch?v=UUQINVO2v5M