Who's hopping today?
Pond cleared!
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Hop across the pond, only on stones that fit the rule.
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On a keyboard: the arrow keys โ โ โ โ choose a stone, and Enter hops. Tap ๐ก for a hint, or the face button to switch critters at any time.
Odd and even numbers, the times tables from 2 to 10, and number bonds to 10, 20 and 100. Every pond is new each time, and the wrong stones are near misses, like 14 in the 4 times table, so guessing does not work.