est-ce que tu as un crayon
You say un crayon in French.
In French, the word for crayon is "crayon," which is masculine. Therefore, it is referred to as "le crayon." When using adjectives or articles with it, you would use masculine forms, such as "un crayon" for "a crayon."
un crayon is a masculine noun in French
"un crayon" (masc.) is a pencil in French.
A sharpener is called "un taille-crayon" in French.
crayon
bleu foncé crayon
Souhaitez-vous un crayon
un crayon de bois / or / un crayon à papier
un crayon is a masculine noun in French
CRAYON, of course, is French for PENCIL. I think what you want is CRAYON DE COULEUR.
Un taille-crayon is a pen sharpener