A family fun day with a VW show, stalls and live music will be staged at Newhaven Fort on Saturday August 3.
Dweebz Fest will run from 10am to 10pm, with money going to the Rockinghorse Appeal and Connor Saunders Foundation. Live music from 4pm.
Tickets £7 for adults, £4.50 for children and £20 for a family.
Call the fort on 01273 517622 or Dweebz of Dubs 0845 0133643 for more details.