Geared clock teaches elapsed time using number lines. Help children calculate intervals of time and solve elapsed time problems. Advanced NumberLine Clock comes with a clock frame and 2 detachable number line chains - 1 for AM and 1 for PM. Simply unfold the number line chains, snap them together, and you've created a number line out of a clock.
WARNING: Choking hazard - small parts. Not for children under 3 years.
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