Originally Posted by ElizabethN
I caution you against vocally disbelieving your son when he insists that someone is stealing his stuff. Sometimes it really is being taken, in a sneaky way that doesn't leave evidence for Mom.

Thank you very much for the caution, Elizabeth, as I have walked in those shoes myself as a child who was very small for my age and who was also grade skipped and got stuff taken away by older bully girls in my early elementary years (decades ago). I will keep your caution in mind to see if there is a pattern of this happening and ask DS who was around him when he loses stuff.