It's not even lunchtime, and already the ten Blunder children have messed up the laundry, the bathtub, and taking care of the animals. They are driving their mother up the wall. So she sends them out to play with just two rules: keep track of one another and make sure everyone is home by sunset. As the day draws to an end, each Blunder tries counting the others -- forward and backward, in English and Spanish, and even by twos and three -- but comes up with only nine. Uh-oh! Will their mother forgive the biggest blunder of all? Inspired by a common folktale, Christina Soontornvat shares a humorous story about ten kids who just can't get things right, while Colin Jack's adorable artwork lets readers in on the joke that each child is forgetting to count him- or herself.