When life gives them a problem to solve, Peg and Cat make lemonade — and get a lesson in bartering — in a refreshing math adventure.
It’s a hot day, so what could be cooler than setting up a lemonade stand? When Peg needs some marbles to keep her special marble company, she and Cat decide to sell lemonade in exchange for ten marbles a cup. But the Teens have other ideas. “But just one cup for ten marbles?†says Mora. “I’m not made of marbles!†So Peg and Cat keep changing their sign until they hit a price — two marbles! — that has customers lining up. There’s just one problem: Peg and Cat forgot the cups! Can they barter their way back into business — or will they end up totally freaking out?