UPCOMING

■ Weird (Food) Science. 6 p.m. today. Free. Hamilton Mill Branch, 3690 Braselton Highway, Dacula. Learn the science behind odd culinary creations such as fruit caviar and jelly noodles. To receive samples, children must be accompanied by a parent or guardian. gwinnettpl.org.

■ Touch-a-Truck & Treat. Noon-3 p.m. Oct. 21. $2. Bogan Park Community Recreation Center, 2723 North Bogan Road, Buford. Dress in your favorite costume and experience a variety of cars and trucks from all over town and trick or treat with those who operate them. Carnival games and a bounce house will be available. Register by Tuesday with code BOP41403 to receive a trick-or-treat bag. 678-277-0850, GwinnettCountyEvents.com.

■Train-or-Treat Candy Drive. Through Oct. 21. Southeastern Railway Museum, 3595 Buford Highway, Duluth. Bring candy in exchange for two historic train ride tickets. Candy must be in sealed bags - fun-size and individually wrapped only. 770-4762013, train-museum.org.