I've just come back from taking my DD (11 months) to my MiL's, where she looks after my DNephew (3.3 yrs) 3 days a week. My DD started playing with his toy cars, and he became increasingly upset, to the point where he was bawling his eyes out and needed to speak to his mum. Through his tears I eventually worked out that he was upset because my DD was playing with his cars. I gave them back to him straight away and he calmed down.
I understand this is a developmental stage - learning to share - but is there anything I can do to help when I see him like this? I feel :( for him that he gets so upset.
MiL cuddles him but generally tells him to 'be a big boy' and not be so possessive. 