Though he looks like an avuncular conductor of a giant toy train set, he labors daily trying to give away one of the world’s biggest fortunes, that made by his son at Microsoft.

Start a toy trade program in your community. Instead of spending money on new toys made of materials such as metal and plastic, try getting kids in your family and community to trade toys.

It was a flying toy made of cork and bamboo. The body was made of paper and the power was supplied by a rubber band.