Adrian is almost three years old, and he is very interested in numbers. He counts everything and everywhere. So, today, we are having an introduction to a Montessori Teen Board, where I offered him to count beads and match them to their corresponding numbers.
He would count the beads first, and then find the corresponding number.
"Nine tiny blue beads!"
Matching a number nine to the beads he just counted.
"The ten-bar has ten little beads in it!"
The order was not important, the goal was to associate quantity to a numeral.
Starting with (3) teens at a time is plenty for a toddler. At the end, you may also present a Three-Period-Lesson (see how to introduce a Three-Period-Lesson here). Keep in mind that you would want to present this activity few times before a child can get a solid understanding of the teen building. Read about the official Teen Board presentation, once Adrian turned three, here.