ValentÃn amaba mirar el cielo de confeti, lleno de nubes-tortitas y pájaros
que cantaban rimitas tontas.
ValentÃn loved to look at the confetti sky, full of pancake-clouds and birds that sang silly little rhymes.
Grammar: The verb "amaba" is the imperfect past of "amar" and is followed by another verb in the infinitive ("mirar") to express what he loved doing, while "lleno de..." describes the sky with a complement introduced by "de".
De niña, Ana amaba leer cuentos antes de dormir.
El parque estaba lleno de niños que jugaban y de perros que corrÃan.