There's more than one way to memorize the elements on the Periodic table. You can turn them into a rousing game of Battleship or brighten up the pages of your favorite coloring book with Calcium, Potassium, and Titanium. Etsy shop Que Interesante adds some educational fun to art supplies by selling labels that match a chemical element with a wax crayon.
The pairing of chemical and color is done in a thoughtful and clever way–Que Interesante uses the "flame test" to determine the hue. This scientific procedure detects the presence of certain elements based on the color of flame produced. When put under this test, Lithium, has a red flame, so it's coupled with a crayon of the same color. Likewise, Barium emits a green blaze and is matched accordingly. The goal is to help expose children to names of the elements so that they passively learn about them as they color.
Que Interesante sells sets of 24, 96, and 120 labels, depending on how scientifically detailed you'd like your crayons. They are all available in their Etsy shop.