Here's some fun ideas for kids when they are getting restless and noisy at restaurants:
Use the forks and spoons to make a tic tac toe grid and use packets of sugar and sweetener that are usually on tables as markers for a game of tic tac toe.
Sprinkle a teaspoon each of salt and pepper onto a napkin. Have your child rub a plastic spoon on his hair for about a minute. Then tell your child to hold the spoon over the napkin -- the static electricity makes the pepper -- but not the salt -- jump onto the spoon.
Play a guessing game. Take turns stating your guesses as to what the next person entering the restaurant ( or walking past your table if you can't see people entering the restaurant) will be wearing. Will they have a hat? A red shirt? High Heels? Tennis shoes? See who gets the most guesses right.
Bring three paper cups and a couple of cotton balls with you to the restaurant and play the tried and true "which cup is the cotton ball under?"
Play a sitting (and quieter) version of "Follow The Leader." The leader can make funny faces, pick up different items on the table, fold his napkin a certain way, fold her arms a certain way, tap fingers in a certain pattern, etc.