System, Duplo and Quatro

, by  Didier ENJARY
[English] [français]

You already know the Duplo® line. Twice the size of System® bricks, and compatible with System bricks.

In 2004 Quatro® bricks appeared on the market, twice the size of Duplo’s Bricks and four times the size of System’s bricks:

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For Duplo and System only, some plates are also available.

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We can clearly see that a System plate is 1/3 the height of a System brick. The Duplo plates are only 1/2 the height of a Duplo Brick (and the same height as a system brick).

A quick building shows that there is a nice compatibility between the lines from smaller to bigger:

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But also from bigger to smaller :

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The ascending compatibility is observed in the majority of the cases, although a large number of exceptions exist from bigger to smaller:

System bricks can have an uneven size which is not compatible with Duplo’s bricks or plates.

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System plates are not compatible at all with Duplo’s bricks or plates.

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Even though Duplo plates fit perfectly on Quatro bricks...

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Only the Duplo 2x2 brick can fit correctly on top of a Quatro brick.

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This is mainly due to the stiffening plate between the tubes:

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What is it used for ?

Marketing : The bricks you buy today for 1-3 year old children (Quatro) are compatible with the ones you’ll buy later on (Duplo, System).

Adult Fans often use Quatro and Duplo covered by a layer of System bricks to create large building structures such as mountains.

What about an Octo line ?

I doubt it. A Baby line (0-12 monts) already exists but isn’t compatible at all.

A size smaller than System ?

It did exist ! It was used by architects and is called Modulex

Talking about large bricks, some cool links:

- http://www.bmts.com/ bccook/blocks.htm
- http://www.brickshelf.com/cgi-bin/gallery.cgi?f=26552
- http://www.brickshelf.com/cgi-bin/gallery.cgi?i=77707
- http://www.brickshelf.com/cgi-bin/gallery.cgi?i=77708

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