COUNTYThe Old Stone House will host “Homebrewed History: Beer and Medieval Europe” at 2 p.m. Saturday; tickets are $25, available by calling 724-738-4964 or visiting www.stonehouseCPH.org. All ticket holders must be 21 or older. Also, an exhibition called “Here & There,” exploring batik craftsmanship and techniques used to create the designs on cloth, is planned for 2 to 4 p.m. April 9 and 16; exhibit admission is free. School-aged children can try basic batik activities both days. School teachers and art camp directors can register their students ahead of time to ensure sufficient materials for projects. For more information, call 724-738-4586.Harmony Museum, 218 Mercer St., Harmony, offers tours from 1 to 4 p.m. daily, except when the museum is closed Mondays. Admission is $7 for adults, $6 for senior citizens, and $3 for youths 6 to 17. Call 724-452-7341.

PITTSBURGHPhipps Conservatory and Botanical Gardens, 700 Frank Curto Drive, will host a “Party in the Tropics” from 7 to 11 p.m. Friday for those 21 and older. Music and art of the tropical forest will be featured. This event is free with admission of $15 for adults. Visit phipps.conservatory.org.Heinz History Center, 1212 Smallman St., presents “Toys of the ’50s, ’60s and ’70s.” Center admission is $16 for adults, $14 for senior citizens, and $6.50 for children 6 to 17. Hours are 10 a.m. to 5 p.m. daily. Visit www.heinzhistorycenter.org.Carnegie Science Center, North Side, presents the 77th Covestro Pittsburgh Regional Science & Engineering Fair with projects on display from 9 a.m. to 4 p.m. Friday at Heinz Field and an awards ceremony from 9:30 to 11:30 a.m. Saturday also at Heinz Field. The fair features more than 1,200 students in grades six through 12. First place winning projects will be on display in the science center’s main lobby through April 10. Visit CarnegieScienceCenter.org.Children’s Museum, Allegheny Square, presents the play, exhibit/art installation TapeScape 2.0, showing unexpected uses for packing tape, through May 22. The museum is open 10 a.m. to 5 p.m. daily. Admission is $14 for adults and $13 for children 2 to 18 and senior citizens. Visit www.pittsburghkids.org.ToonSeum, a museum of cartoon art, 945 Liberty Ave., hosts “Alt-Weekly Comics,” a historical retrospective about the comics of the alternative weekly newspapers, and “Fear of a Black Marker: Cartoons by Keith Knight, Gentleman Cartoonist,” both through April 10. Admission is $8 for those 13 and older and $4 for children 6 to 12. Call Visit toonseum.org.National Aviary, 700 Arch St., presents a baby Linnaeus’ two-toed sloth. Admission is $14 for adults and $13 for senior citizens and children ages 2 to 12. Hours are 10 a.m. to 5 p.m. daily. Visit www.aviary.org.