I found this wonderful and creative activity pack called Pirate Place Value (from Frogs and Cupcakes) and absolutely had to use it. My maths class loves to do activities and so I love making maths a "students-don't-think-they-are-learning-when-they-really-are" experience. Thus, rather than just having students do repetitious worksheets, I often use either activities or hands on learning for my lessons.
When learning/teaching place value, students should be able to represent a number in standard, expanded and word form. Here is a cute and fun activity for students to represent a number in all three ways.