EXPERTS

For the past half year I've been attending to two boys of two and three as a day nanny four days per week. It's going well altogether, the children have got used to me, and cooperation with the parents is working out well too. But there are situations time and again where I feel somewhat helpless and that mostly has to do with conflicts occurring between the boys.
For his birthday, Lukas (3) got a new digger that he loves more than anything.

I'm a nursery nurse and have only been working in this profession for half a year. The thing that I've already noticed in this short time, however, is the fact that some children are very “popular” from the beginning and easily make contact while others are literally being excluded.
Children simply don't show any consideration there, and I can't expect it from them at that age either, can I?
My question is how I, as a nursery nurse, can influence or rather steer this process of exclusion (I'm not playing with you, you're not my friend, he's stupid etc.) positively so as to provide every nursery child with enriching experiences if possible.