Or just create your own virtual reality
In 1988 a professor at Southwest State University in Marshall, Minnesota started an experiment with students of average IQs. The students, exercising their minds with a specific protocol, demonstrated IQ gains ranging from 2.3 to 0.9 per hour. They measured a 20 point increase in IQs over the 40 hour duration of the experiments —additional gains after this period appeared to be open-ended. Perhaps not so incidentally, the exercise was found to increase creativity, vivid mental imagery, cross-hemispheric communications and verbal fluency in addition to facilitating access to subconscious processes.