LOL Aidyn is 3.5, and when he is in a cranky mood he still says No when he actually means yes!
I also still get a No protest for a large majority of things that we ask/tell him... "Aidyn its shower time now" = "No!!" "Aidyn its time to go to the toilet" = "No!!"... hopefully he will grow out of this soon, but he was a late starter in this area, and didn't start with the No's until he was over 2yo.