Ocean Life Theme for Preschool - Preschool Lesson Plans This Ocean Life Theme page is filled with preschool lesson plans, activities and ideas for your classroom. There are so many more activities and ideas that can be added to this theme! Go for it! Add your seashells, fish and other theme ideas to create a month long Beach or Ocean Theme! Ocean Activities, Lessons, Printables, and Teaching Ideas Free Ocean Activities & Printables @ Other Sites Sandy Beach Activities During these activities the children will observe a sandy beach scene and identify sea creatures.