[header] How to be a responsible eldest sister [title] Spend time getting to know your younger sibling (s). [step] Since you are closer in age to your siblings than your parents, you likely are more able to have fun and play with your brothers and sisters. Having fun helps grow a positive relationship, the sort that makes a family work well together. 
Play games, read books, watch movies, and engage in each other's interests. Find things that you can enjoy doing together.