You could use this activity to show students how the world is round and where all the continents and oceans are located. The first grade standard is in the geography strand under spatial thinking and skills saying: Maps can be used to locate and identify places. You could use the book There is a Map on My Lap!: All about Maps by Tish Rabe to show the students what maps look like.
These are continents in a box. I love the idea that children can explore the continent (looking through pictures of places, animals, people, etc). This would be great to do with countries and states as well.