Kids Ages

I was sitting at dinner tonight and was amazed at my 8 yr old.  He spilled a little milk, and immediately got up to get a towel to clean it up.  A year ago, my husband and I would get so annoyed that our 2 boys would spill a drink and then just stare at it.  It still annoys us about our 4 yr old.  It amazed us that our oldest was mature enough to take care of it himself, quickly.  WOW!