My Grandfather built me a sand box but it sure was not this elaborate!
Compact and complete, this back-yard summer resort for small children includes a wading pool, sand-box, and shelves on which to put away boats, pails, and beach balls. Removable awnings protect against sunburn and on cloudy days are stored beside the tiny “cottage”.
General dimensions are given, but the size may be increased, if desired. Skids 9 ft. 6 in. long permit moving the “beach” from one spot to another.
The sand-box floor is tongue-and-groove material. For the tank, use 3/4 by 10-in. boards with squared edges. Candle wicking is laid in marine glue along each edge before the next board is drawn up tight, and it is also used at the sides and comers, where triangular cleats are nailed or screwed down over the calking. Bear in mind that marine glue is not casein glue; each has its purpose and each is excellent for that purpose. A sketch shows how the candle wicking is laid.
The central “cottage” is constructed as indicated in the cutaway perspective. The partition is important as it prevents water from being splashed over into the sand and sand being tracked into the pool. Also, toys can be kept in order on the shelves.
All sharp corners and edges should be rounded. The hardware should be galvanized. or very thoroughly painted. Brass screws are best for the water tank. An effective paint combination would be a dark green exterior for the sand-box and pool; a lighter green for the cottage, with a red roof; and bright yellow for the inside.
Original Source: Popular Science, April 1939 (click here to get your copy).