No crayons though 35 Beautiful Examples of Melted Crayon Art - ekstrax
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.
you know aforesaid DIY melted crayon art ideas on canvas. And make sure you remove the wrap of crayons before you melt them. Use the good quality of canvas #artsandcraftssurely,