The Cathedral of St. Joseph in downtown Baton Rouge invites grandparents, parents and their children to the seventh annual Grand Day on Sunday. The theme is “The Joy of Creation.”

Mass with the Rev. Paul D. Counce begins at noon, where children and their grandparents will receive a special blessing. The Baton Rouge Magnet High Festival Singers will perform.

An outdoor street party following the Mass will feature hamburgers, hot dogs, ice cream, pony rides, music, a petting zoo, Bubbles the Camel, face painting and caricature sketching.

All activities and food are free and open to the public. Call (225) 387-5928 for more information.

Cardio on the dance floor

Peoples Health will sponsor a cardio line-dancing class with instructor Jackie Porter on Monday in the first-floor hospital classroom at Ochsner Medical Center, 17000 Medical Center Drive.

Registration begins at 10:30 a.m. and the class is at 11 a.m. There is no charge to attend.

Participation is limited to 30 people and reservations must be made by Sunday. Call (800) 561-4127 or visit peopleshealth.com/wellness to sign up.

Search for treasures

Highland Road Community Park will be the launching pad to find hidden treasures all over Baton Rouge during a geocaching session from 5:30 p.m. to 7 p.m. Wednesday.

Use your smartphone or one of BREC’s GPS units to track down geocache containers, some of which may offer a swap; bring a small token or trinket to trade for something better.

For more information, call (225) 272-9200, ext. 559, or email outdooradventure@brec.org.

ACT practice test

Teens preparing for the ACT can take a free practice test at the Main Library on Saturday. Register online at princetonreview.com.

Be at the library by 9:15 a.m. with two No. 2 pencils and a calculator. The practice test starts at 9:30 a.m. and ends at 1:30 p.m.

Showcase of Women Authors

Local and regional women authors will be at the Main Library from 2 p.m. to 6 p.m. Saturday to showcase work while networking and meeting with patrons. Come meet a local author and get your book signed.

MST3K (sort of) and trivia

“Romeo + Juliet,” starring Leonardo DiCaprio and Claire Danes, will be shown “Mystery Science Theater 3000”-style from 4 p.m. to 7 p.m. Sunday at the Main Library. Light refreshments will be served.

Shakespearean trivia will follow the movie, and prizes will be awarded to those demonstrating the most knowledge.

This event is in conjunction with the National Library of Medicine’s “And there’s the humor of it” The World of Shakespeare’s Humors exhibition.

Kids’ story and craft

Children ages 4 to 8 can listen to a reading of Toni Yuly’s new book, “Night Owl,” at 4:30 p.m. Monday at Carver Branch Library, then make an owl using a brown paper lunch bag.

Movie and popcorn

Eden Park Branch Library will show the Halloween movie “Hocus Pocus” to families at 5:30 p.m. Wednesday. Popcorn will be served.

Contact Mid City Advocate Editor Darlene Denstorff by phone, (225) 388-0215 or (225) 603-1998, or email southside@theadvocate.com.