DD (now 12) did some things freakishly early (like speaking and walking) and others she pretended not to know how to do for years (reading). Then other things she seemed incapable of doing long after she should have (puzzles), but we never knew if it was inability or distaste. Her development was such a mystery. And we had almost nothing to compare her to.
I remember when she was maybe 18 mos old she had a set of nesting plastic cups in several colors. One day she sat and grouped them, first by size (larger v. smaller), then by color (blue, yellow, red). But she took forever to get the difference between brown and grey down.
