Twelve solid hours of hands-on science, presentations, special planetarium shows, and interesting space science with a keynote from Richard Garriott on the potential dangers of an asteroid impact. 9am-9pm. $11-15, free (members).
Celebrate the holiday the way they used to back in the day, with a square dance Friday night (8-11pm). Then Old Texas Comes Alive Saturday and Sunday (10am-5pm) as they gussy up their star-spangled historic sites for the Fourth. Fri.-Sun., July 1-3. $10.
Pioneer Farms, 10621 Pioneer Farms Dr., 512/837-1215
Come out with the family for games, music, snacks, and a movie. 5:30-7:30pm. Free.
The cool kids call it RTX. The people that supply you with your Red vs. Blue machinima fix and new series Day 5 bring you this celebration of gaming and internet culture. Get your hands on the newest games before they hit the streets, learn about VR from the creator of Oculus Rift, and so much more! Get 10% off your passes using the code: RTXCHRON. Fri.-Sun., July 1-3. $45-85.
The supply of platelets has fallen to an unsafe level. Anyone who is able is urged to make a platelet donation appointment as soon as possible. Platelet donation may be done every 7 days or 24 times per year. The entire process from the time a donor walks through the doors until they leave is approximately 1 to 1.5 hours. Call to make an appointment. Open seven days a week.
offer nooks-and-crannies walking tours that spotlight the dead to bring Austin's history and geography to life. Fri.-Sat., 8pm.
This mobile spay/neuter clinic might be in your
neighborhood today. Check www.emancipet.org
to find out. Fri.-Sat., check-in begins 8am (first come, first served). Free.