1. Explore the galaxy without leaving Buffalo!
At 1 p.m. Saturday, two mega-murals will be unveiled at the Buffalo Museum of Science depicting the spiral galaxy Messier 101. Toast Galileo while you're at it, and mark the International Year of Astronomy. Free at 1020 Humboldt Parkway with museum admission (www.buffalomuseumofscience.org).
2. Planning a trip to Hawaii or the Galapagos?
Don't miss Rick Batt of Buffalo State College presenting a "Hot Spot and Island Chain Volcano" lecture at 7 p.m. Wednesday in the auditorium of the Gateway Executive Office, 3556 Lakeshore Road, Blasdell. Slides and video footage of an actual lava flow will be shown. Admission $3 (www.penndixie.org).
3. Once upon a time, there was an aquarium that sat in the shadow of a world wonder.
Visit the Aquarium of Niagara on Saturday and hear yarn after yarn as told by Karima Amin. Story times are 11:30 a.m. and 2:45 p.m. in the Community Room on the second floor. Make a bookmark to take home. Free with admission at 701 Whirlpool St., Niagara Falls (www.aquariumofniagara.org).
4. Flick and float.
Enjoy a night of swimming and movies at the Northeast Family YMCA, 4433 Main St., Amherst. The movie is "WALL-E," and the water is wet! Event runs from 6:45 to 9:15 p.m. Friday for children ages 6-12. Call 839-2543 to register. $12 non-member, $5 member.