Downward diaper? This baby yoga class helps parents bond with their infants and get a workout, too! Custom poses help these tiny yogis not only stretch their muscles but also stretch their brains.

Gurgle, kiss and rhyme — all this was as normal as downward dog posing during a yoga class. "It’s baby’s turn to do some yoga," says instructor Melissa Bilka and an "ooh" floated up from seven moms on ...