The University of Texas offers a lot of free and low cost concerts with fantastic musicians! Use this link through out the year to see upcoming concerts that might interest you!
Butler School of Music Upcoming Events
I am also a member of the Austin Civic Orchestra and Cedar Park Winds. Both of these organizations offer low cost to free concerts for students and families. Please check out ACO's website for more concert dates and information.
Cedar Park Winds is a group of music educators that get together and perform music that is engaging and relevant for students and families. Please check out the website for performance dates.
Austin Brass Collective also does free concerts throughout the year and has some great music and themes like 80's music, Broadway, Video Games and much more!
There are also many small theaters that offer good priced tickets for families and offer great performances throughout the year.