Moroccan Restaurant and Addis Ababa Ethiopian, both on Georgia Avenue, are very kid friendly.

Moby dick sushi in Wheaton:
http://mobydicksushi.com/moby-dick-sushi-menu.htm

Tofu teriyaki, spinach, cucumber and avocado rolls, and veg tempura for your veg friends

Nava Thai in Wheaton.

http://www.saigoneserestaurants.com/Vegetarian.html

Mmm good.

I think it beats Hollywood east, Thai Dusit. Haven't been to woomi, but does Woomi even have vegetarian. Saigonese is were we go when we dine with vegetarians, and where we go for great Vietnamese food.