The TallyTots cast
Each friend shows you one idea by how they act. Meet them all and see how the ideas fit together.
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Ribbet Mental number line / magnitude — a frog who hops the linear 1→10 lily-pad path; farther along IS more (the Ramani–Siegler core) -
Dottie Subitizing — a ladybug whose back-spots you know at a glance, without counting; instant recognition IS subitizing -
Wriggle The successor principle — a caterpillar who grows one segment when you add one and sheds one when you take one; ±1 IS the next/previous number -
Clutch Counting / cardinality — a hen who touches each egg once as she counts; the last number IS how many in all