SUZANNE KREITER/GLOBE STAFF

Kim Shipley navigated Boston with daughters Coraline, 2, and Arya, 7 months.

suzanne kreiter/globe staff

Kim Shipley on the subway with her daughters.

JOHN TLUMACKI/GLOBE STAFF

Rhode Island School of Design student Meredith Schwarz demonstrated an invention to help travel with children.

JOHN TLUMACKI/GLOBE STAFF

Schwarz showed how a new harness fits a stroller.

JOHN TLUMACKI/GLOBE STAFF

Schwarz uses a doll to demonstrate the harness, as fellow students watched.

JOHN TLUMACKI/GLOBE STAFF

Students presented their idea for the invention in Cambridge.