they really need to learn some basic piecing- like 4-patches---or rail fence strips----paper piecing is not an easy project for a child just learning to use a sewing machine- they will totally enjoy just sewing squares together into rows- then into a quilt top- maybe around a cute panal or novelty fabric they pick out-
trying to teach them such a complicated block (which may seem easy to you but certainly is not a beginner block) will only frustrate them - they will probably walk away quickly-
we started kids as young as 4 sewing in the sewing school- they all loved it and 8 years later all still sew--
they started with sewing lines on paper with no thread- from there they started sewing squares together- 6 of 9 kids (boys & girls) made quilts- 2 of them made purses- they designed/created themselves- and 1 made pillows- all of them love sewing- and make things alot- 3 of them have made numerous quilts-
1 of them i believe would be interested in something along the lines of the block you created-
it is a wonderful endeavor you are taking on- but i think you are getting a little ahead of yourself- and thinking of teaching an adult quilting class not little kids who have no experience yet-...following patterns will come in time...but start a little simpler for a positive experience for all concerned.