At the very beginning of Zork you are wandering through the forest. At one point, after branching around for a while you hear a bird singing above.
If you say 'climb the tree' you read "You are about ten feet above the ground nestled among some large branches. The nearest branch above you is beyond your reach."
If you 'climb higher' you see "On the branch is a small birds nest. "
If you look in the nest, "In the bird's nest is a large egg encrusted with precious jewels, apparently scavenged somewhere by a childless songbird. The egg is covered with fine gold inlay and ornamented in lapis lazuli and mother-of-pearl. Unlike most eggs, this one is hinged and has a delicate looking clasp holding it closed. The egg appears extremely fragile."
If you open the egg roughly, "There is a golden clockwork canary nestled in the egg. It seems to have recently had a bad experience. The mountings for its jewel-like eyes are empty, and its silver beak is crumpled. Through a cracked crystal window below its left wing you can see the remains of intricate machinery. It is not clear what result winding it would have, as the mainspring appears sprung."
If you wind it, "There is an unpleasant grinding noise from inside the canary."
If you open the egg gently, "The canary chirps, slightly off key, an aria from a forgotten opera.
From out of the greenery flies a lovely song bird. It perches on a limb just over your head and opens its beak to sing. As it does so, a beautiful brass bauble drops from its mouth, bounces off the top of your head, and lands glimmering in the grass. As the canary winds down, the song bird flies away."
When I found that as a 7 year old, sitting in the dark after everyone in my family had gone to bed, peering into the screen of my 286, I knew that text adventures are the only game worth making.