Look at a bunch of objects and then remember as many as you can.
Tray of objects, pencils and paper
This is fun for all ages - just so they are old enough to write. Prepare a tray with about 20 objects on it. Give each child a pencil and paper. Hold the tray up so they can see it for about 30 seconds then remove the tray from sight. See who can name the most objects they saw in a 3-5 minute period depending on the age.