Bricks that Multiply when given water

Name :
Taisei Maruyama
COUNTRY :
Japan / Nagano
AGE :
8
YEAR :
2013
PRIZE :
The Prize of the Minister of Economy, Trade and Industry
COMMENTARY :
When a tsunami is about to strike, these bricks multiply by themselves and block the waves. Usually there is only one layer of bricks. Each brick has a face, so they are fun to look at.
Bricks that Multiply when given water