Kaiten zushi a/k/a conveyor belt sushi or sushi-go-round is a great way to introduce kids to a variety of sushi. My 8 year old daughter tried nigori with snow crab, tuna, eel, shrimp and shrimp dumplings and had a great time grabbing what looked interesting off the conveyor belt. The color coded plates help keep track of prices. Very reasonable and they won't even accept tips. Sushiya (or "Sushi Hiya!" as she pronounces it) is located on the 2nd floor of Whole Foods on the Bowery. See great recent NY Times article lamenting uniform kids' menus all of which feature chicken fingers. Not for Guttergourmet's Daughter!