Residents of the Lake Travis and Westlake area can attend a robotics competition, take a sailing class and gaze at the stars this weekend.

FRIDAY, JULY 28

1. Vandegrift High School robotics competition Student teams spent six weeks building robots for the FIRST Robotics Competition, when teams compete against one another with their robots. 9 a.m.-6 p.m. (Fri.), 7 a.m.-6 p.m. (Sat.). Free. Vandegrift High School, 9500 McNeil Drive, Austin. www.viperbotsboosters.org[email protected] 2. ‘The Wild Life’ at Lakeway City Park The city of Lakeway presents a showing of "The Wild Life" at Lakeway City Park. Guests can bring a lawn chair or blanket. Snacks are available for purchase along with free popcorn. Starts at dusk, around 8:45 p.m. Free. 502 Hurst Creek Road, Lakeway. 512-314-7532. www.lakeway-tx.gov

SATURDAY, JULY 29

3. Lakeview real estate auction Several lots with a view of Lake Travis are sold during a live auction at The Oasis Lakeside Terrace. 10 a.m. Starting prices range from $75,000-$400,000. The Oasis Lakeside Terrace, 6550 Comanche Trail, Austin. 512-266-2442. www.oasis-austin.com 4. Introductory sailing class Landfall Sailing offers a sailing class teaching students how to rig, steer and sail. 7-9 p.m. $50, reservations required. Landfall Sailing, 105 Yacht Club Cove, Austin. 512-627-9901. www.landfallsailing.com 5. Austin Under the Stars The Austin Astronomical Society and St. Stephen’s Episcopal School partner for the 20th year in a row to hold Austin Under the Stars. Attendees may be able to see Jupiter and Saturn. 6 p.m.-midnight. Free. St. Stephen’s Episcopal School, 6500 St. Stephen’s Drive, Austin. 512-327-1213. www.austinastro.org

SUNDAY, JULY 30

6. Sierra Club meeting The Austin Sierra Club holds a meeting at the Old Bee Cave Schoolhouse to talk about environmental topics the organization is addressing at the local, state and national levels. People who want to stay after the meeting can join a walk around the sculpture gardens. 4-6 p.m. Free. Old Bee Cave Schoolhouse, 13333 W. Hwy. 71, Bee Cave. 512-477-1729. www.meetup.com/austin-sierra-club-outings 7. Sunset Canyon Baptist Church groundbreaking Sunset Canyon Baptist Church breaks ground on a Family Life Center, which will be a 21,000-square-foot space for a gym and multipurpose rooms. 10:45 a.m. Free. Sunset Canyon Baptist Church, 4000 E. Hwy. 290, Dripping Springs. 512-894-0480. www.sunsetcanyonchurch.org