My 22 months old toddler recently stopped sharing toys. She would share all her toys when other kids come around. BUT she WILL NOT share toys when she goes to their house. She gets really excited when she sees new toys at her friend's house. Naturally, the kid who owns the toy want to play with his/her toys, but she won't give it to them. She would scream when the kid comes to take his/her toy.
It has become a really embarassing situation for me. I can't even do any playdates with anyone because my daughter wants other kids' toys.
What can I do to teach her? Please give me some tips. This is making me crazy.