#socialnorms

My 4yo is picking up negative behavior from friends. How can I shift this?

It seems that my 4yo son and other friends of the summer camp are getting a kick out of making a little boy upset and keep bothering him because they noticed he easily cries.
I already told my son that it is not okay to bother our friends if they do not want to be bothered.
What do you recommend?

My 5yo is worried about what her friends will say. Is this normal?

Last week I had her pick out her ballet outfit in the morning so that when she got dressed for dance after school in the parking lot, she wouldn’t be surprised or disappointed. So we got dressed in the outfit she picked out and she noticed her leotard had little sleeves on it…
oh my god - full blown tantrum. So sad so upset “everyone is going to think my leotard is ugly!!!” “They are not going to like it”
Then yesterday morning we were getting ready for school and we packed her favorite meal in the whole wide world, meat sauce and noodles… I told her that was what’s for lunch and she sadly said “oh no please don’t pack that in my lunch anymore, the other kids think it’s yucky, and I don’t want to be the one with a yucky lunch“.
It broke my heart as it is her very favorite to eat. I know social influences will happen all the time but how do I handle these things at 4/5 years old? What do I say?