What is the best age to introduce your kids to pet? I want to teach him reponsibillity by having one.

If you have never had a pet in the household, a good age will be when your child is 5 and beyond (as suggested by this article: http://sg.theasianparent.com/how-to-choose-best-pet-for-your-child/). At this age, the child could understand and learn how to be responsible for the pet. He/she is also capable of cleaning and caring for the pet. In addition, the child is able to differentiate between playing with the pet and not mistreat it. Do refer to the article for some great tips on how to choose the best pet and suggestions on the different types of pets to consider. :)