Frieda Funkel wants to gift her beloved Stanislaus Starkstrom the famous contactless wish siren. However, this is easier said than done, as she must solve ten tricky puzzles, construct circuits, and learn about electronic components and coding – and for that, Frieda needs your help. Join Frieda on an exciting journey into the world of visible and invisible light and solve the ten puzzles that will lead you to the mysterious wish siren. Together, build an infrared sniffer, a coded light barrier, a pulse meter, a barcode reader, and many other fascinating projects.