Foam bricks for crafts is easy to use and the size can meet any design need. These floral blocks are made of soft fine foam,easy to absorb water. Ideal foam blocks for beautiful crafts and floral arrangements. Can be easily cut into any shape or desired size, suitable for all popular flowers and bouquet. Superior water-holding capacity , balanced pH levels helps flowers thrive and last, great flower arrangements supplies. Quick and easy to use. Fill a bucket or bowl and place the brick on the surface. It is ready to use once it has sunk to the bottom and the air bubbles have stopped. Do not soak for too long.