Here are three simple ways to say that for a 7-year-old:
- Frog eggs hatch in the water and become tadpoles. Later they grow into frogs that live on land.
- Baby frogs start as eggs in the water, turn into tadpoles that swim, and then grow up to hop on land.
- First, frog eggs hatch into tadpoles swimming in the water. After they grow, they become adult frogs who live on land.