Tat-chan - Momo-chan no Fushigina Taiken
たっちゃん・ももちゃんのふしぎなたいけん
Description
Tat-chan and Momo-chan are kindergarteners playing in a sandbox as usual. They get sucked in a game world where they watch Waterman fight Satan Fire. This OVA is meant to teach fire safety to children.