School is back in session this week and so are Woodland Park Zoo’s animals, sort of.

This weekend, Sept 12 and 13, zookeepers will help stimulate the minds and hone natural behavioral skills of the animals with back-to-school-themed treats, such as sack lunches, textbooks and more.

From 11 a.m. to 2 p.m., hear zookeepers talk about how treats and a variety of activities are part of the zoo’s ongoing enrichment program to help improve the lives of the zoo’s animals, promote natural animal behavior, keep animals mentally stimulated and engage zoo visitors.

Back-to School treats: Saturday and Sunday, September 12 and 13, 11 a.m. to 2 p.m.

Lemurs 11:00 a.m. – Tropical Rain Forest

Colobus monkeys 11:30 a.m. – Tropical Rain Forest

Orangutans 11:30 a.m. – Trail of Vines

Grizzlies noon (Saturday only) – Taiga Viewing Shelter, Northern Trail

Otters noon (Sunday only) – Taiga Viewing Shelter, Northern Trail

Raptors 12:30 p.m. – Raptor Center

Gorillas 1:00 p.m. – Tropical Rain Forest

Keas 1:30 p.m. – Near Willawong Station

Pigs 1:30 p.m. – Family Farm

Anoas 1:30 (Saturday only) – North of the Raptor Center

Willawong Station 1:30 p.m.

Elephants 2:00 p.m. – Elephant Barn or Pool

Zoo summer hours: 9:30 a.m.-6 p.m. daily. Admission through Sept. 30: Adult (13-64) $16.50; Child (3-12) $11; Toddler (0-2) Free.

Seniors and people with disabilities receive a discount and zoo members receive free zoo admission year-round. Parking: $5.

For more information about Back to School and other events and programs, visit www.zoo.org or call 206.548.2500.