The Fairly OddParents: Season 6, Episode 8

6 - 8: The Land Before Timmy

When Timmy wishes for a simpler world, everyone is transported to prehistoric times, and when volcanoes hit prehistorical Dimmsdale (Dimmsrock), Timmy has to find a way to power Cosmo and Wanda's wands before the city burns down, since the town is built under four volcanoes.