The Japanese toy Nanoblock is best described as miniature LEGO, the bricks are about 1/3 the size of LEGO.
Due to the tiny size of the individual bricks, it is possible to build quite detailed models, without the use of too many specialized bricks - building with Nanoblocks is a lot like, what building with LEGO was in my childhood; where the use of specialized bricks was quite limited in comparison to today.
Due the tiny size of the Nanoblock bricks, building with them is also somewhat more complex ans challenging than building with LEGO - and you use a lot of bricks for even a small model. This means that Nanoblocks can best be described as a combination of LEGO and traditional minature model building - it is imho. great fun, takes quite a lot of time (even for a small model), but the result is very rewarding.
Nanoblock has released four Tintin themed sets. These are licensed by Moulinsart, though only for release in Asia - but they are readily available on eBay (watch out for the prices, as they vary a lot!)
The sets are:
The Unicorn ship from The Secret of the Unicorn
Shark submarine from Red Rackham's Treasure
The Moon rocket from Destination Moon/Explorers on the Moon
Marlinspike Hall
I recently bought the shark submarine. It is a 900+ bricks level five set, estimated building time is five hours, I built it in approx. 4½ hours.
The details of the model are quite good - and quite true to the album art. In my experience, it is instantly recognisable by even non Tintin fans.
http://www.flickr.com/photos/jakobeep/8150697375/in/photostreamThe finished model, with the packaging and a standard size LEGO miniature for comparison.
http://www.flickr.com/photos/jakobeep/8150697781/in/photostreamThe finished model on the cover of a Danish 1st edition of Red Rackham's Treasure
There is no doubt I will be collecting the remaining thee sets, staring with the Moon rocket. The models contain enough detail for them not to stand out when displayed with my collection of Tintin figures - and it is somewhat more fun to actually build something, rather than to be simply unpacking a finished figure/model :)