A good set, based on the canadian snap circuits (clone). They took in addition to the already available small entry-level set. The central part of this set is part 21, which is a happy birthday melody generator. Inside there is only an eight-mortar chip with a minimum of strapping (a transistor, apparently, as an amplifier). Looks like an attiny controller. Another "chip" of this set is the vhf radio unit on the famous rda5807m chip. Actually ready receiver, requiring only power and dynamics. Inside, in addition to rda5807m, another operational amplifier and again some simple controller. In general, the set is good and quality enough. Now such can be bought noticeably cheaper than it was at the time of purchase.
The designer came broken, the box was very much wrinkled. Opened a dispute with a full refund of money, but returned part. I'm very angry, the designer was a gift, now consider that there is no gift. And the money wasn't all returned. Make a conclusion yourself.