At 3 DS could read all upper and lower case letters, and numbers. Was learning to read double digits (ie 34) and could tell me which letters, words begin with.
(We are now working on hundreds thanks to the hundreds of buses we see on a weekly basis)

He loved copying Daddys cardio routine (push ups, star jumps, sit ups)

Was very even tempered and could be reasoned with easily (that went out the window the week he turned 4)

He is a very tidy eater. Much cleaner than his Dad lol and hates to get his hands dirty so is quite good with cutlery.

He loves to help and will do jist about anything if you can phrase it that way (and he believes you lol)