Arboretum event

“The Holiday Railroad” 9 a.m. to 4 p.m. through Jan. 4, Morton Arboretum, Visitor’s Center, Interstate 88 and Route 53, Lisle. View multi-level model garden railroad that winds through a holiday wonderland display. (630) 725-2066, www.mortonarb.org.

Museum

“Dinosaur Day” 10 a.m. to 4 p.m. Saturday, Jan. 3, Lizzadro Museum of Lapidary Art, 120 Cottage Hill Ave., Elmhurst. Ages 5 to adult. Activities include assembling large wooden dinosaur skeletons, excavating bones, dinosuar floor puzzles and dinosaur word search and maze. Free with admission.  (630) 833-1616.

Music

Justin Roberts concert 10:30 a.m. Saturday, Jan. 3, College of DuPage, McAninch Arts Center, Mainstage, 425 Fawell Blvd., Glen Ellyn. Children’s singer’s videos play on Noggin. Recommended for ages 3 to 7. Tickets are $14 and $12. For tickets, call (630) 942-4000.

Special event

Health fair and fitness expo Lombard Park District, 9 a.m. to noon, Saturday, Jan. 3, Sunset Knoll Recreation Center, 820 S. Finley Road. Class demonstrations, lectures, prizes, health screenings, fitness tour. All ages. Free. (630) 953-7300.

Workshop

“Mediation — The Civilized Divorce” workshop 1 p.m. Sunday, Jan. 4, Brown and Associates Counseling and Mediation, 102 S. Washington St., Hinsdale. $55. To register, call (630) 455-4655.