Vintage 1950s American Building Bricks made of wood in natural and red color. They have holes on one side and the other side has knobs. They are a very early form of legos. The set is suitable for children aged 8-11 years and 4-7 years old. There are 39 full bricks, 10 half bricks and 3 angle bricks. They come in a wood box to keep them all together.