Call it a buddy system. Call it free babysitting. Call it nanny training for chipper teenagers. The practice is the same: Assign the smaller kids to the older kids for basic stuff like tooth-brushing and shoe tying.
Photo Credits: The CW; John Paul Filo, CBS; Ron Batzdorff/NBC; George Kraychyk/Hulu; NBC; NBC, Peter Kramer/NBC; Gregg DeGuire/Getty Images; Jason LaVeris, FilmMagic; NBC, Chris Haston / NBC; Chris Haston/NBCU Photo Bank/Getty Images; Vivian Zink/Getty Images; Bill Records/NBC via Getty Images