Must buy ! Attractive!!

By combining 46 blocks incorporating transistors and resistors, you can conduct 150 electrical experiments such as wireless microphone, alarm, electronic buzzer, lie detectors, and so on.

Contents are electronic block body, 46 blocks, microphone, antenna wire, earphone, 60 cm cord, tester stick, Japanese manual. 

You can easily learn about electronics simply by inserting a block as shown in the manual picture

It is also an attractive kit for both adults and children, so it would be nice to experiment with them all together. 

Especially for the adults used to own this in 70's and grew up.