'voici mon crayon, voilà mon crayon'
You can say "J'ai un stylo" in French to mean "I have a pen."
un stylo
'son crayon'
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.
Here is ici in French
vous avez un stylo
pi djosw
un crayon