Old Stone House will open its grounds Saturday and Sunday to explore the history of the Civil War, including the 10th Pennsylvania Reserves Mercer Rifles re-enactors. This public program will be from 10 a.m. to 5 p.m. Saturday and 10 a.m. to 4 p.m. Sunday. Old Stone House is at the intersection of Routes 8, 173 and 528. A donation of $3 per person, or $5 per family, is encouraged.

regionDrake Well Museum, 202 Museum Lane, Titusville, is open 9 a.m. to 5 p.m. Wednesdays through Fridays. The Heritage Lecture Series installment today will celebrate Col. Edwin Drake's 193rd birthday with cake and a slide show “Then and Now II” by Earl Yingling. Doors open at 6:30 p.m. with the program at 7 p.m. Admission is $2. Call 814-827-2797 or visit drakewell.org.

<B>Phipps Conservatory and Botanical Gardens</B> presents its spring flower show with the theme of world destinations through April 15. Brunch in Bloom will be offered from 11 a.m. to 1 p.m. Sundays during the show; registration is required. The conservatory at One Schenley Park is open from 9:30 a.m. to 5 p.m. daily and until 10 p.m. Fridays. Admission is $12 for adults, $11 for senior citizens and for students with valid ID, $9 for children ages 2 to 18, and free for children younger than 2. Call 412-622-6914 or visit http://phipps.conservatory.org.<B>Fort Pitt Museum</B> in Point State Park is featuring “The American Frontier Rifleman: Tall Tales & Truth” through April 30. Visit www.heinzhistorycenter.org.<B>Heinz History Center</B>, 1212 Smallman St., presents “Stars and Stripes: An American Story” through June 17. The center is open daily from 10 a.m. to 5 p.m. Admission is $10 for adults, $9 for senior citizens, $5 for students with ID and for children ages 4 to 17, and free for children 3 and younger. Call 412-454-6000 or visit www.heinzhistorycenter.org.<B>National Aviary</B>, 700 Arch St., hosts breakfast with the Easter Bunny from 8 to 10 a.m. Saturday. Cost is $25 for nonmembers and $20 for members. Reservations are required. Call 412-323-7235.<B>Children’s Museum</B>, 10 Children’s Way, Allegheny Square, continues the “Wheels” exhibit through May 13. “Bike Week” will be held Sunday through April 5. Hours are 10 a.m. to 5 p.m. Mondays to Saturdays and noon to 5 p.m. Sundays. Admission is $12 for adults, $11 for children ages 2 to 18 and senior citizens, and free for children younger than 2. Call 412-322-5058 or visit www.pittsburghkids.org.<B>Carnegie Museum of Natural History</B>, 4400 Forbes Ave., Oakland, has free admission from 3:30 to 8 p.m. today. Andy Warhol’s eight “Dogs and Cats” paintings are on view in the Entrance Gallery through June 30. Regular admission is $15 for adults, $12 for senior citizens, and $11 for students with ID and children ages 3 to 18. Hours are 10 a.m. to 5 p.m. Tuesdays through Saturdays, with additional hours until 8 p.m. Thursdays, and noon to 5 p.m. Sundays. Call 412-622-3131 or visit the website www.carnegiemnh.org.<B>Carnegie Science Center</B>, North Side, hosts a lecture by Leslie Bonci, director of sports nutrition at the UPMC Center for Sports Medicine, Monday at Café Scientifique. Doors open at 6 p.m. A question-and-answer session will follow the lecture, which starts at 7 p.m. Admission is free, but online registration is recommended. Dinner is available for $8. Call 412-237-1821 for information.<B><I><U></B></U></I>