This book is aimed at technology enthusiasts, both young and adult, who want to recreate sophisticated inventions and understand them in the process. Based on the fischertechnik construction system, the book provides ideas for various technical applications such as electromechanics, sensor technology, or hydraulics that go beyond the usual. The step-by-step instructions intentionally push the boundaries of the pre-made fischertechnik system in some places. Such new components can be easily sourced from a nearby hardware store or online. Exploring new paths and experimenting is encouraged. All models shown in the book are fully functional but intentionally leave room for improvements. The book also addresses optimization points for many of the models. The author has posted YouTube videos for some of the models online.