answer:At 11 the child should know how to behave when out at a restaurant. If they don’t, hire a babysitter. When my children were toddlers and acted up, one of us would take them to the car while the rest of us finished our meal. Horror story- Our extended family went out to eat at a Chinese Buffet for a family reunion. My son and my sister decided to make a concoction of condiments when everyone was done eating. Ketchup, soy sauce, hot mustard, you name it. My mother, having grown up during the depression, wasn’t thrilled with this. She made my son (age 11 at the time) eat the concoction that was my sister’s idea (age 40+). Needless to say, I wasn’t happy with my mom.