Ultraman: S1 E15 - Terrifying Cosmic Rays Ultraman

Elementary school student Mushiba drew a picture of Gavadon like "white tadpole", and was laughed by his classmates. Mushiba thought if it were bigger picture, it might look better, and drew Gavadon bigger on the clay pipe at the material stockyard. And in the next morning, a huge Gavadon acututally appeared! A special cosmic ray and sunlight merged and the painting of Mushiba has materialized!