Makerween

10 a.m. to 6 p.m., Saturday, Oct. 28

Kitchener City Hall

This free event will have you making costumes from cardboard, carving pumpkins, creating robots, painting, making music and printing things in 3D. It's great for all ages and really young children will love the dark room with lights. Be sure to take in the pumpkin carving contest and you can even try your hand in the "carved on site" category.

Halloween Hunt Downtown Galt

1 p.m. to 3 p.m., Saturday, Oct. 28

Play with Clay, 10 Water St. N., Cambridge

Downtown Galt businesses are getting into the Halloween spirit this year by encouraging people to dress up and trick-or-treat at local shops. Pick up your map at Play with Clay and hit up the stores to get stamps on your map. Enter to win one of four gift baskets.

Both Galt and Guelph are holding trick-or-treating events in their downtown cores Saturday. (Alex Wong/Getty)

UW science open house

10 a.m. to 4 p.m., Saturday, Oct. 28

Science Teaching Complex, University of Waterloo

Enjoy hands-on fun and discovery at the open house, great for all ages. There will be programs that include everything from chemistry to earth sciences and you'll have a chance to speak with student volunteers. At the same time, the annual gem and mineral show is taking place at the school's earth sciences museum (Friday noon to 6 p.m. and Saturday 10 a.m. to 5 p.m.). You could also win a large hunk of Labradorite (a pretty cool looking blue-green-grey stone).

Downtown Guelph trick-or-treating

12 p.m. to 3 p.m., Saturday, Oct. 28

Guelph Public Library, 100 Norfolk St., Guelph

If you or your children are super excited for Halloween and simply cannot wait until Tuesday night, this event is for you. Hit the library first to hear a spooky story and pick up a map, then head out into Guelph's downtown core to visit many different stores that are handing out candy – and perhaps some other treats – and they'll stamp your map. Mayor Cam Guthrie will be at city hall for this special event. If getting lots of candy isn't enough, when you end at The Dragon in the Old Quebec Street mall, you can hand in your map and get a comic book and raffle tickets to enter draws for even more free stuff. There will also be a performance by the improv group The Making Box in the mall from 1:30 p.m. to 2 p.m.

Dress your dog up and head down to the Howl-o-week parade Sunday afternoon. ( Mary Altaffer/Associated Press)

Howl-o-ween parade

1 p.m. to 2 p.m., Sunday, Oct. 29

Kitchener City Hall to Victoria Park

Dogs in costumes! From pumpkin pugs to crabby corgis to German shepherds dressed as shepherds - this is your chance to show off your dog's Halloween duds. Meet at city hall then walk to Victoria Park. Prizes will be handed out for best dressed dogs. Dogs do need to be social and non-aggressive and no retractable leashes, please. Don't have a dog? Come out and just check out all the pooches (and owners!) in their costumes.