As I am writing this, my youngest daughter is playing with one of those things where you have to put blocks through holes with the same shape. i.e. star shaped blocks through star shaped holes etc.

She did 2 circular blocks first, and that went well.
Then she tried one of the others and she couldn't fit them.
After looking at the box for a couple of seconds, she pulled off the lid and neatly put the blocks in the box.
Then she looked up and gave us a big wide grin.



That's my girl.