Lego bricks have convex beads on one side and holes for inserting the convex beads on the other side. There are more than 1,300 shapes, and each shape has 12 different colors, with red, yellow, blue, and white. , mainly black.

It relies on children to use their own brains and hands to create endless shapes. It is addictive and is called "magic plastic building blocks".

Most LEGO bricks have two basic components - a nub on the top and a hole on the inside.

The bump of the block is slightly larger than the space between the hole and the side wall.

When you squeeze the blocks together, the nubs push the side walls outward and the holes inward.

The material is stretchy and holds its shape, so the side walls and holes will squeeze against the bumps.

Friction also comes into play, preventing the two blocks from sliding apart.

The point hole joint system uses the principle of interference fit - a friction-based tight connection between two parts without the use of other fasteners.

You can use three 2x2 boards to make a 2x2 brick or three 2x4 boards to make a 2x4 brick.

Alternatively, you can use 2x2 bricks and boards at the same time to make 2x4 bricks.

Basic LEGO components are available in blue, black, dark gray, green, light gray, red, yellow and white.

Extended information:

The development history of Lego blocks:

Lego blocks were initially just simple toys to stimulate the intelligence of infants and young children. The inventor of Lego blocks was Oli ·Kirk.

In 1891, Ollie Kirk was born in the village of Felsgov near Billund, Denmark.

He has superb carpentry skills and was keen on making various small toys when he was young. The small airplanes, cars and animals made by him are all lifelike and lifelike.

Although he did not know how to do business and toys were often unsaleable, this did not make him give up his hobby.

Later, the puzzle toy "Yue Yue" he designed finally became popular.

In 1932, he invented a plastic toy that could be inserted into each other, and combined "Leg" and "Godt" (Danish for "play well") to create "lego" "(Lego) brand.

In 1934, he designed the "LEGO" trademark for his building block toys.

Lego means "play happily" in Danish and "read" and "combine" in Latin.

Oli Kirk believes the word is in line with his original intention.

Thus the LEGO brick and the LEGO Company were born.

Lego bricks used to be made of wood. After World War II, with the popularity of plastic products, Lego bricks were also made of plastic.

In 1949, the first Lego plastic building block came out.

Two years later, plastic building blocks based on the hole-post connection principle were launched on the market.

Soon LEGO launched building block products specially designed for infants and young children aged 3 months to 5 years old.

This kind of building blocks are 8 times larger than ordinary building blocks, which can prevent infants and young children from accidentally eating them and causing danger.