If you've never heard of a bike bus—or a bicibús, as it's known in the Catalonian capital of Barcelona—it's a beautifully simple idea. Kids and parents ride their bikes to school along a pre-planned route, picking up classmates along the way, just the way a school bus would. Except because it's bikes, it's way, way more fun. Sarah and Doug rode along with bike buses in Barcelona and suburban Montclair, New Jersey, to see how it works, and we talked with organizer Sam Balto in Portland, Oregon, to find out why kids who ride with bike buses get to school feeling happy and energized.

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