'son crayon'
You can say "J'ai un stylo" in French to mean "I have a pen."
un stylo
correspondant is the translation of pen pal. It is a person who becomes friendly.
A fountain pen is 'un stylo-plume' in French. (plural: des stylos-plumes)
un feutre
un stylo
Un stylo bleu. BY THE WAY stylo does not mean blue its pen in french colours come after the noun.
un crayon
vous avez un stylo
j'écris au stylo
pi djosw
Est-ce que vous avez un stylo? (à me prêter?)