123s with Tonellio is a fun way to learn and remember numbers. 123s with Tonellio is a book with numbers 1 through 10, both numeric and written so young readers can recognize the numbers, recite the numbers aloud, learn to count and learn how to write the numbers. It is a picturesque teaching tool for young children as well as a vehicle for them to express themselves by coloring the characters and scenes as they picture them.