Episode two's theme is Movement and sees the teams compete in two challenges. The first is an unplanned build where they each must build a different mode of transport. The teams are given three hours to build a mode of transport but half way through they are surprised by a disruptive twist where they must swap with a different team, their final model being a unique hybrid of the two. This episode's Planned Build is entitled All the Fun of the Fair and sees the teams create a miniature funfair and populate it with at least one spectacular moving ride and as much detail and story scenarios as possible. Guest judges mechanical engineer Dr Shini Somara and TV personality Richard Osman must decide which team hasn't made it through.
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