This is a set of Rhythmic Building Blocks A and B from the Rhythmic Research Center. Due to the difference in musical notes, they are not sold separately. There are stains on the front and back of the lids. The elephant stickers are split in half and are also peeling off, so please check the photos. These are useful for learning note values and can be used not only for eurhythmics but also for piano lessons. There are animal stickers attached and some scratches. Please consider this item as used, as it has been used for over 10 years. The two boxes will be placed directly into a larger box for shipping. #RhythmicResearchCenter #RhythmicBuildingBlocks #NoteBuildingBlocks #MusicalNotes #Eurhythmics #PianoLessons #EarlyChildhoodEducation