Youth: Spock's Museum

Barry Greenfield, 3, climbed onto a huge scale and discovered that he weighs as much as 47 cans of Campbell's chicken-with-rice soup. Yvonne Younis, 7, lay down on a brobdingnagian desk top, twelve times normal size, beside a ruler in the same scale and found that she is 4 in. tall. Mark Stanton, 10, crawled under the flap of an Indian hut, looked around and then popped a bit of pemmican into his mouth.

The children were having fun in what all too often presents a forbidding atmosphere: a museum. But the private,...