"Your friend will find these photos interesting."

[mwtzzz]

Is the following an okay way to say "Your friend will find these photos interesting":

"A tu amigo le parecerían interesantes esas fotos."

[mwtzzz]

Or perhaps is better this way:

"Creo que tu amigo le intereserían esas fotos. Por favor muestrese las"

Is ok?

[AngelicaDeAlquezar]

Both options, with some little changes would be fine. :)
Some hints and explanations for improvement below:

Is the following an okay way to say "Your friend will find these photos interesting":

"A tu amigo le parecerían (Try the future here; if you use the imperfect, then you need to specify that the friend would find the photos interesting... "if what?") interesantes esas fotos."

Or perhaps is better this way:

"Creo que tu amigo le intereserían (Check spelling. And here I also prefer another conjugation. Try a structure with "poder", or in this case, the simple present may be fine.) esas fotos. Por favor muestrese (Check spelling and person agreement) las (The direct object or indirect object pronouns are never separated from a conjugated verb)"

Is ok?

[mwtzzz]

How about this:

"A tu amigo le parecerán interesantes esas fotos."
"Creo que tu amigo le pueden interesar esas fotos. Por favor se las muestras."

[aleCcowaN]

"A tu amigo le parecerán interesantes esas fotos.":good:
"Creo que a tu amigo le pueden interesar esas fotos. Por favor se las muestras."

Por favor, muéstraselas.
Por favor, si se las puedes mostrar.
¿Se las muestras, por favor?

[mwtzzz]

excellent.