Mathematics - Addition and Subtraction - Two-digit addition with regrouping - The Ones Overflow

Show a scenario: a ten-frame of ones is FULL (10 ones). Ask 'What happens when we have too many ones? Do they: A) Disappear, B) Become a ten, C) Stay as ones, D) Explode?' Fun multiple-choice that leads to the insight that 10 ones 'regroup' into 1 ten. Show the animation of 10 cubes transforming int