Same with anything else. I likes to help clean, but only when he wants to. If he's asked, no dice. Having "chores" or "clean up" on a schedule didn't change this, despite him always wanting to do what was on the schedule any other time.
This past weekend, however, I finally found a way that works (at least for him)!
He likes to watch the show "UmiZoomi", and they always have missions. He also likes to play video games where they have specific challenges or missions to complete for him to move on in the game. I put this knowledge to the best use I could, and hand wrote a note for him to find in the morning. (He cannot read 100% on his own, but he can pick out the majority of the words these days.)
It read something along the lines of:
Here are your missions for Sunday morning:
1) Pick up living room
2) Vacuum living room
3) Put away YOUR laundry
The list actually had 7 items on it, but all were tiny (the living room was mostly picked up already), easy to do (one was literally telling me a different room was ready for me to vacuum it), and worded simply so he felt he could read it himself and would actually try.
He took to the "missions" swimmingly, and took great delight in crossing the items off as he completed them. I'm going to start putting "missions" on the fridge on a dry erase board and see if I still have luck getting him to cooperate!
Disclaimer: Thoughts of Fluff is responsible for the content of this post. All opinions are my own and may differ from those of your own.