Crayfish Science
Crayfish connection.

The Crayfish Corner
This is an excellent site if you need a wide variety of information about crayfish. It even has crayfish jokes and stories.

Seeds
What are seeds?

The Official Seed Starting Home Page
This site lets you pick from about 75 different seeds and gives information on when to plant, how to plant and about the plant itself. The charts will be helpful for practicing vocabulary.

Willeys Christmas Trees
This site shows the life cycle of a seed by following the growing of pine trees from planting, fertilizing to harvesting.