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It's Not London Bridge, And It's Not Falling Down
The Tower Bridge is an intermediate difficulty wooden puzzle with 104 pieces. It's designed for ages 8 and up. Assembled, the Tower Bridge 3D puzzle measures about 4.5" x 23" x 8.5" (11.4 x 58.4 x 21.6 cm).
3D wooden puzzles come die-cut on 3mm-thick sheets of high-grade wood, complete with sandpaper. They include a picture of the final assembled model and a numbered chart to help you out if you get stuck. Painted, varnished, or left as natural wood, historical puzzles deliver a challenging, educational and creative activity. No tools or glue are necessary, although you might want to use a bit of white glue if you're assembling your model for permanent display. Some pieces may come pre-painted. Background illustration is not included.
Are you curious...?
Tower Bridge takes its name from the nearby Tower of London. It's often mistaken for London Bridge, which is actually the next bridge up the Thames. Construction began in 1886 and took five contractors five years to pour 70,000 tons of concrete, erect 11,000 tons of steel, and clad the finished bridge in Cornish granite and Portland stone. It's a combined bascule and suspension bridge ("bascule" means drawbridge). The original raising mechanism was hydraulically powered with two steam engines creating the pressure. In 1974 they replaced the steam engines with electric motors. The project cost 1,184,000 pounds, which works out to 110 million pounds in 2010 money. That's about $175 million to us Yanks.