Another issue that has come up for me - we just joined a new playgroup which is so fun. There are 10-12 kids and we go to a local preschool that lets moms organize groups. Most of the kids are 4-5 months older than N which is great in many ways. She is used to older kids from daycare and from the play spaces we visit etc.
I've noticed older toddlers in the 2-4 range can get pushy and will shove N (or other younger kids who don't know about sharing, etc) out there way. Sometimes it is gentle bumps other times I've seen kids outright mean shove. If a parent is nearby they usually intervene, if not I gently try to distract N, remover her if I think something is really wrong or try to help distract other child or if they are old enough ask them kindly to please not push, hit etc.
This happened at playgroup Monday. 4 kids in a little play house and one kept pushing N. I know the girl is still learning and N is too little to be really upset or even necessarily notice but I swear I teared up at the thought that a little friend did something mean or that maybe N won't have friends etc.
I feel so new and unsure about so many of these emotional / developmental things and wonder what you all do, how you react, etc. I know it is normal to be crazy protective and I'm also crazy AF hormonal right now but I felt a bit embarrassed that I might cry.
Re: Interacting with older toddlers
Oh and this last Saturday Matt played with a kid younger than him... this time it was me saying "Matt becareful he is a baby" :P
Is she small for her age? I think sometimes I worry less about O because hes such a big boy. I think it'd be different if I had a girl, although I was a bit of a bully as a small child myself.
I think how you feel is totally normal. And in time your DD will learn the tools she needs to deal with it.
Don't feel embarrassed, I still get all anxious and sad when I watch an older child not want to play with Kai. It is hard to know that the world can be tough on little people, and know that one day you won't be able to completely protect your baby.
That said, I try to monitor play group situations pretty carefully. If something like that happens I try to explain when we don't hit, push, etc in age appropriate words ... Attempting to make it a learning situation for both. I have one of each end of the spectrum right now, the shoved and the shoved.