How does he do that?

I know every parent thinks their kid is the smartest, best looking, most advanced kid ever.  I just have to share for a moment what my kid is doing that has been blowing our mind.  He has this wooden puzzle that has the alphabet.  Each piece has the letter and a picture of something that starts with the letter. On the board of the puzzle it has the word of the picture spelled out in black and white.  Each piece is actually the same shape and size, so any piece will fit into any space.  A few weeks ago Austin mastered putting the alphabet in perfect order, and he can't even say any of the alphabet yet. He has done it numerous times since and it still just blows our minds.