He picked up the perfect pebble, he planned to skip it across the entire small what?\nOptions:\n- manual\n- lake\n- aquarium\n- pond\n- playground
Let's think step by step below.
pond
Pebbles can be skipped on a waterbody.

Pond is small waterbody.

One can skip pebbles across the entire small waterbody like pond.

.

Therefore, the answer is pond