Weird science

The Science Museum of Minnesota hosts Boo-ology. Kids who wear their Halloween costume will receive free admission to the permanent exhibit galleries. Engage in spooky hands-on science activities with a Halloween spin. Discover what archaeologists know about the ancient Maya through artifacts and hands-on activities. (1-4 p.m. Sat. $10-$13. Science Museum of Minnesota, 120 W. Kellogg Blvd., St. Paul. 651-221-9444. www.smm.org.)

Howl-o-ween

Trick-or-treat amid nature while learning about some of the woods’ most misunderstood creatures. Show off your costume and sip on apple cider by the warmth of the campfire. Decorate your own trick-or-treat bag and enjoy nature activities For added admission, guests can enter the haunted barn. (12-4 p.m. Sat. $4-$6, $1 for haunted barn. Wildlife Science Center, 5463 W. Broadway Av., Columbus, Minn. 651-464-3993. www.wildlifesciencecenter.org.)

MELISSA WALKER