Recently, I watched my grandson playing with some blocks. He was cheerfully building a tower by piling each brick one on top of the other. At some point, the tower became unstable, and he laughed loudly as the blocks tumbled down. He …( read more )
Recently, I watched my grandson playing with some blocks. He was cheerfully building a tower by piling each brick one on top of the other. At some point, the tower became unstable, and he laughed loudly as the blocks tumbled down. He …( read more )