I'm very into crafts and also have a daughter with additional needs.
Today there was a party hosted by a charity which I'm quite involved in and today I provided sensory bottles for the children to make, they could then take them home etc. There were lots of beads, buttons, bottles, ribbons, rice, sequins etc so much stuff there was plenty to go round with stuff to spare.
I was sitting at the large table with my dd and my friends dd (who is 9) was a few spaces away from me. There were also two women who come to events quite often in holidays but who I don't socialise with outside of events.
Friends dd had spent a good hour making a sensory bottle and was quite happy and content, her dm was with her db in the quiet room so she was alone but were all friends so she was safe etc and having fun.
Anyway the two women draw my attention because they are tutting, laughing and loud whispering. The dd was saying no and then when I noticed properly what was going on she got up to another table and started crying. I asked what was going on and one of the women said the dd was being selfish, not sharing.
I left my dd with another mum and went to the little girl and said don't worry and took her to her mum.
The other two mums came over to me and said 'is she ready to share now' I just 
and said no because she had made it and that was the point of me bringing things in, for the kids to make their own. The mothers knew this FYI as well.
The dd was ok and I told my friend what happened but I'm so angry at the two women. You don't essentially pick on a 9 yr old who is getting upset and is alone. Wtf was wrong with them.
I'm angry and don't know what to do but I don't think they should get away with the behaviour but I also don't know what should be done.
Tell me to get over it, just pissed it happened tbh.