Do you remember your first educational toy? One of the first that many children get is the big, chunky puzzle—four to ten easy-to-grip pieces that fit into spaces on a board.

This is one of the first experiences a child has with matching shapes to corresponding spaces, helping them develop their shape recognition skills.

My wife thinks I was never given one of these puzzles. Every time I put the dishes away, the plastic food storage containers stump me. I end up trying to put medium containers into small containers and square containers into round ones. It's as if, in her words, I never got the proper training as a child. I pretend she's just joking, but maybe she's right—I really can't remember.

If you've purchased this little book, ...

Get Jump Start CSS now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.