This section is from the book "The Boy Mechanic Vol. 2 1000 Things for Boys to Do", by Popular Mechanics Co.. Also available from Amazon: The Boy Mechanic, Vol2: 1000 Things for Boys to Do.
To utilize scraps of soap, make a soap shake of a medium-size baking-powder can, as shown in the sketch. Punch holes in the can with an ice pick or some other sharp-pointed instrument, and attach a large wire to the center, twisting the ends to form a handle. - Contributed by Elizabeth P. Grant, Winchester, Virginia.