Is there an appropriate place to go with small children to celebrate New Year's Eve in the Irvine/Tustin area?
Check with the Rainforest Cafe @ South Coast Plaza. Last year they held a NYE party at 6 PM.
Check with the city. Down here in RSM there are kid friendly activities in Central Park.
Discovery Science Center is having a NOON Years Eve celebration (noon instead of midnight) might be fun to check into.