Indoor Surfing Experience at Twinwoods - Key InfoVoucher Validation Your voucher is valid until 01 Jul 20 You must validate book and use your voucher within the voucher expiry date.Duration: Allow 2 hours at the venue. Sessions are 1 hour long with customers taking it in turns to ride.Group Size: This voucher is for one person you will be in a group with up to 12 other people.Weather Dependent: NoSpectators: You are able to bring along spectators to watch.Restrictions and Considerations: You must be reasonably fit to participate in this experience. It is not suitable for those with glasses back neck and shoulder problems osteoporosis heart problems or if you are pregnant. The minimum height is 132cm (4ft 3).The minimum age is 5 years old under 18's must be accompanied by an adult.Availability: This experience is available Wednesday to Sunday throughout the year subject to availability and change.