Revisit the traditions of the holidays at Heritage House in the Fullerton Arboretum Dec. 13 and 20. Walk-through tours of the period-decorated house will be held from 2 to 4 p.m. Costumed docents will be on hand in each room. Father Christmas will be available for photo opportunities; seasonal musical will be performed from 2:30-3:30 p.m. The program is free, with a suggested donation of $5.