The perfect Advent calendar for all friends of electronics and tricky puzzles. Stanislaus Starkstrom has a problem. He wants to surprise his sweetheart Frieda Funkel on Christmas Eve by hanging a ringing and blinking Christmas decoration on the Christmas tree. But to make that happen, he must solve 24 mysterious puzzles during the Advent season, build exciting circuits, and learn about electronic components and coding. Can you help Stanislaus so that he can experience a harmonious Christmas with Frieda? No prior knowledge or tools are necessary. All you need is patience, imagination, and a love for puzzling and experimenting. Behind each door, there is one or more components needed to solve the daily puzzle. With the corresponding solution code, you can then move on to the next task. If you solve all 24 puzzles, you will not only bring a happy Christmas to Frieda and Stanislaus, but you can also hang your own ringing and blinking Christmas decoration on the tree – guaranteed to be unique.