Musical group Natural Vibration will rock the playground at 'Aikahi Elementary School as part of a concert lineup from 5 to 9 p.m. Friday.

The concert also includes Peaceful Warriors (formerly Pressure Drop), Eons and Sunday Morning Chaos.

All proceeds will go to help pay for a new school playground that will be built by the children and the community from Jan. 6 to 11.

Tickets are $10 in advance at Muddy Waters in the 'Aikahi Park Shopping Center or $15 at the gate.

The family-friendly concert is smoke- and alcohol-free. No outside food, beverages, coolers or chairs are allowed.

For more information and other presale locations visit www.aikahiplayground.org.