The "Monkey Day" parade is a very big deal. The crowd loves to watch the Monkey Cyclists who cycle two by two (2, 4, 6, 8…). They're followed by the Monkey Tumblers, who travel in groups of three (3, 6, 9, 12…). Finally there's the Monkey Band lined up four across (4, 8, 12, 16…). Counting by 2s, 3s and 4s is called skip-counting and is an important step in the development of multiplication skills. Used with permission from Stuart J. Murphy.
MathStart 2: Spunky Monkeys on Parade (Counting by 2's, 3's, and 4's)