Edheads.org does not have a virtual back surgery simulation. The website does offer a virtual hip replacement surgery simulation and a virtual knee replacement surgery simulation.
Edheads.org publishes educational math and science activities for students in second grade through 12th grade. It lists each activity with the appropriate grade level and the topics it covers. Younger students can learn about simple and compound machines, and older students can participate in activities such as designing a cellphone and simulating aortic aneurysm surgery. The site offers the opportunity to vote on future activities and support future activities through donations. Users need to have a computer with a sound card and speakers, a current Web browser, and the latest version of Adobe Flash Player to be able to complete the activities on the site.