These Artline 300 Liquid Crayons are a great drawing and colouring tool to have handy in any artistic environment. These liquid crayons give off the effect of a wax crayon, and can be used with water to create a paint effect. The liquid crayons are xylene free and come with a ventilated cap which will prevent choking. These Artline 300 Liquid Crayons are a great drawing and colouring tool to have handy in any artistic environment. These liquid crayons give off the effect of a wax crayon, and can be used with water to create a paint effect. The liquid crayons are xylene free and come with a ventilated cap which will prevent choking.