We as parents (my husband and I) never let our son get away without learning a lesson (when there was one to be taught), and I think that that is exactly what you did with your grandson!
-you didn't take the total amount of money for the toy,
-you didn't shun him
-you didn't hit, slap, beat him
-you simply taught him a lesson.
You taught your grandson that while he did this act, he must pay for what he did however he is still loved. Love conquers all, especially in a grandparents heart!
I think that you should take the parents for coffee and speak to them to teach them the valuable lesson!
I KNOW that you did the RIGHT thing.
As you can see, you have support from the Quilters!
TreeFrog