A beautiful paper clay bowl makes a lovely little gift for Valentine's Day. METHOD: Roll out the paper clay to the desired thickness and carve out a heart. Using a suitably sized bowl as a mould, line the inside with plastic and then place your clay heart inside, giving it a curved shape. Let the clay dry in the mould for up to one week. Remove the heart when it is completely dry and decorate: write with a pen and paint the edges with Hobbylack.