Ninja Warrior UK Adventure Park, Chelmsford

Ninja Warrior UK in Chelmsford is an indoor, supervised obstacle course built along the lines of the ITV series, which makes it a good fit for children with energy to burn on a wet day. The obstacles include the Warped Wall and Mount Sasuke, with climbing, balancing, swinging and bouncing challenges spread across the site. Sessions are staffed and timed, so booking ahead is sensible at weekends and in school holidays.