Did you know that things can be small, medium, or large in size? Young learners will explore and identify basic sizes in Sizes, a title in the Building My Vocabulary series. This series uses familiar images to help children develop language skills. Building My Vocabulary is a series of AV2 media enhanced books. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slideshows, activities, and more.