Fetch! with Ruff Ruffman: Relaxin' with Ruff

SADRžAJ

Ruff decides to calm down from the stresses of running a show. The kids learn to relax with yoga and to calculate heart rate (pulses in 15 sec * 4). Next, they mathematically measure their "fear factor" at Canobie Lake Park, an amusement park in New Hampshire.

TRAJANJE: 30 min