James joins forces with Edwina Currie to build a full-size bridge from nothing but Meccano. Top engineers pitch incredible designs, but the project soon careers out of control when the Meccano does not arrive and James realises it will take longer to build than he imagined. A last-minute accident also means that James's bridge may never see the light of day.

James attempts to construct the world's longest Scalextric track at Brooklands in Surrey.

James attempts to build the world's first full-size house made entirely out of Lego bricks. With thousands of people and over three million Lego bricks, James attempts to do what no-one has ever managed, to build a two-storey house using this colourful toy. Such an ambitious undertaking is not without its problems and James soon has issues with planning regulations, an interior designer who can't get her Lego furniture to stay in one piece and a structural engineer who tries desperately to stop everything from coming crashing down.

James links Barnstaple to Bideford with the world's longest model train set.