Modeling - Hard Subtraction 1

Trixie was 2 years and 11 months at the time that this video was made.

The Problem

Trixie is playing with a collection of toy Sesame Street characters. She has 5 Cookie Monsters and 3 Big Birds. She knows that she has more Cookie Monsters than Big Birds. Then I ask her, "how many more?"

What To Look For In This Video