Interactive dreams: it is now possible to communicate in your sleep and even solve mathematical problems. . Dreams have always fascinated scientists and non-scientists alike, since all human beings dream, even if they cannot remember them. In addition, the dream world has almost always provoked a certain aura of mystery for society as a whole, due to certain issues related to sleep, such as sleepwalking, lucid dreaming, or sleep paralysis. Now, can you imagine that during sleep you could communicate with the real world? Would you be able to solve a mathematical problem or even write a novel or compose a score for an orchestra?