Collect all the pictures you would like to see in the collage. The pictures should relate to the theme. You can use photographs, drawings, colorful papers, newspapers and scraps you find in your house. Choose pictures that are colorful so that your poster will be bright and beautiful.
Lay down the poster board on the table in front of you. Arrange the pictures you collected in Step 1 all around the poster. Try to overlap the pictures so that no space shows between them. If you picked pages from newspapers, you can cut out letters to form words in your poster.
Pick up the pictures and glue to the poster. Do this one by one, carefully picking up each picture then placing it back on the poster board when you're finished.
Set the poster aside to dry.