Citations › Citation ID: 74

C74. BOOK: Daniel Konstanski, The Secret Life of LEGO Bricks: The Inside Story of a Design Icon (Unbound, 2022), p. 159.

LEGO World City had used the old finger hinges, which could prove tricky for little fingers to assemble. The new roof plate didn’t pivot to open; it simply attached somewhat loosely to a vehicle’s top so it could be easily removed. Designers intentionally omitted window pieces on either side of the cab so that children could reach their fingers in and easily pop off the roof plate.

4×6×⅔ Wedge Roof (Part 52031) was introduced as an alternative to hinged roofs that is easy for young kids to remove and reattach.