Spelling bee: The South Shore Plaza hosts the 5th annual Great Grown-Up Spelling Bee at the mall’s center court near Macy’s on Saturday from 11 a.m. to 2 p.m. Broadcaster and Braintree native Butch Stearns will be master of ceremonies. A total of 24 four-member teams will compete using skill, knowledge, and combined efforts to win the championship trophy. Contestants must register at 9:30 a.m. 617-777-7208.
Obstacle course: “Extreme Field Day” obstacle race for children will be held on Saturday on the fields at the Irish Cultural Center. Children ages 4 to 15 years old can sign up online for race heats that start between 9:30 a.m. and 2:30 p.m. There will also be music, balloon animals, and music. Race fee is $40 for all ages. www.extremefieldday.com.
Haunted house: The Alden House Historic Site will host its 12th Annual Alden Haunted House on Saturday from 6 to 9 p.m. There will be guided tours of the house, pumpkin carving, and free cider. Admission to the haunted house is $8 for adults, $5 for children. www.alden.org/our_house or 781-934-9092.
Pumpkin patch: The First Parish of Westwood’s Pumpkin Patch at 340 Clapboardtree St. is now open daily through Oct. 31. Pumpkins, Indian corn, gourds, and other decorative items are available for purchase. All proceeds benefit local and national charities through First Parish’s Outreach Ministry. 781-326-5344.
Cookie day: Whitman Public Library will hold Toll House Cookie Day on Saturday from 2 to 3:30 p.m. There will be a chocolate chip cookie contest, a panel discussion, and book signing. Bakers should bring cookies between 10 a.m. and 1:15 p.m. that day. The event is free and open to the public. www.whitmanpubliclibrary.org or 781-447-7613.