The line up for this year's February Half Term event has been revealed.   Rides open include the park's icon roller coaster Stealth, as well as The Swarm, Flying Fish, Depth Charge and last year's new additions Angry Birds 4D and King Pig's Wild Hog Dodgems.  As well as this, 'Brainiac Live!' are returning, and will give four 45 minute shows each day of the event.  Additionally, there will be mini experiments set up across the park that allow for guests to create experiments of their own...