Toccata Blocks are proportionally shaped tiles that help music students learn about rhythm and meter. By matching the time signature blocks with their correct bases, you create just enough room for the correct number of notes and rests to fit in that measure. The Level One set contains 4 time signatures (4/4, Common Time, 3/4, and 6/8) and note values from a whole note to individual eighth notes, with the corresponding rest values on the opposite side of the tiles. It also includes a rhythm challenge CD, with answer key and tips on how to use Toccata Blocks. It can illustrate very simple rhythms to advanced syncopated rhythms, and can be used with ages 4 up. There are 35 pieces in the Level One set.