Confused Jesslyn

Jesslyn communicate better as compared to Jerilyn at the same age. jesslyn is able to understand and answer some WH- questions as I have mentioned in my blog months ago. However, she is confused when it comes to identifying pictures. For example, she may say cat when she sees a tiger or dog. She says fish (non-specific) when she sees dolphin or any other similar sea creatures. She sees a bear in many animals. She also calls Jerilyn; Mei-Mei at times.
Jesslyn is also a copycat. She follows exactly what her sister does. Sit, jump, play, talk, kick etc.. just like Jerilyn. Even when Jerilyn complains about itchy hand, Jesslyn immediately does the same. Being a copycat is alright. It's part of growing up after all. However, little does she know her limits and she tries to do dangerous things beyond her limits. For example, climbing the sofa from the back, skipping down the stairs, doing somersaults on the bed and walking on 1 chair to another. This is my little Jesslyn.