Crayon Art! Very cool. Tape off the white with Painter's tape. Then after melting crayons, place stencil over bottom, mark with toothpick/chalk and then paint black acrylic paint once stencil is removed.
Hoya is a genus of 200-300 species of tropical plants in the Dogbane family. Native to Asia, Polynesia, New Guinea, and Australia, Hoya are popular houseplants in temperate areas (especially H. carnosa) bc of their attractive foliage and strongly scented flowers. They grow well indoors and prefer bright light. Easy to propagate and has been found to be an excellent remover of pollutants in the indoor environment (Wikipedia)