Pinch off a small piece, mould it, squish it and use it as soap, shampoo, or hold it under high pressure running water for a super bubbly bath. Bubbledough can be re-used: once dry store in airtight container.
If bubbledough becomes too dry and crumbly, add a couple of drops of oil to return its pliability. Bubbledough is a soap product: being submerged in water for too long will result in bubbledough dissolving.