how to make clay float?

Answer 1

1. As cargo inside a container inside a ship?

2. Or flattened ,molded into the shape of a toy canoe, outfitted with outriggers made of bamboo or light balsa wood,

3. A piece of clay inside anything that floats.

Answer 2

Shape it into any type configuration that displaces water such as a boat, bowl, or whatever that has sides and a bottom, or mold the clay around a ball or ping-pong ball. You could also squeeze some packing peanuts into the clay.

Answer 3

I've heard that it floats in mineral oil, but I've never tried it. Fired clay, not moist.