()()

つみき
noun
building blocks; toy blocks
leisure
1. building blocks; toy blocks
Small wooden or plastic blocks of various shapes that children stack and arrange to build structures. A classic children's toy.
()ども()()(あそ)んでいる
The child is playing with building blocks.
I stacked the blocks high and built a tower.
Colorful building blocks are useful for developing children's imagination and manual dexterity.

Usage

()() typically refers to traditional wooden blocks, though modern versions come in various materials. It is one of the most common and recognizable children's toys in Japan.
Sometimes used figuratively to describe something built up carefully that can be easily toppled, similar to "house of cards" in English.

Common collocations