By nature, children this age can be more concerned about their own needs and even act selfishly. At age two, children view the world almost exclusively through their own needs and desires.
Social Development: 2 Year Olds
10-Month-Old Baby: Development, Milestones And Growth
Your 18-month-old's social and emotional development: Making friends
20+ Useful Social-Emotional Activities For Toddlers
Toddler
Don't Raise a Spoiled Child - Tips and Strategies to Help Avoid Spoiling Your Toddler
Your 15-month-old's social and emotional development: Pay attention to meeee!
20+ Useful Social-Emotional Activities For Toddlers
10-Month-Old Baby: Development, Milestones And Growth
Is it better for a toddler to go to daycare or stay home with mom? - Quora
Bossy Toddler? Here's How to Handle Bossy Children
What is better for the development of a 2 year old: one-on-one care from a competent nanny at home, or interaction with other kids at an average daycare? - Quora
20+ Useful Social-Emotional Activities For Toddlers