Block Patterns

I had 20 minutes to solely dedicate to sitting down and playing. I asked Westley what he wanted to do and he said play with blocks.
So to put a new twist on it, since I know he loves games and is understanding patterning, I made a game out of it.
I made a pattern out of the blocks, and without saying anything he would have to get a block and put it next to carry on the pattern

He was really good at this, but struggled when it came to make his own pattern for me to play. I think he was trying to make one too complicated!