Telepathy is defined as the supposed communication of thoughts and ideas by means other than the known senses. In other words, telepathy is mental communication between two or more individuals that is neither subject to time nor space. Probably one of the most prolific modern-day researchers into the paranormal and psychic is, Russel Targ, an American physicist, parapsychologist and author who is best known for his work on remote viewing. I highly recommend sitting through his banned Ted Talk. Remote Viewing is defined as the practice of seeking impressions about a distant or unseen target, purportedly using extrasensory perception or "sensing" with the mind. So very similar to telepathy; they share the same underlying principles.
Everyone can communicate telepathically or remote view a target, it is an innate ability that we have collectively turned a blind eye to. But the good news is that everyone can relearn this exceedingly valuable ability. In fact, animals can communicate in this fashion innately. The incredible story of how leopard Diablo became Spirit is a great story that illustrates what I am saying very nicely.
The idea of this particular telepathy game is to communicate a simple shape and colour to another person.
Blue Square
Red Triangle
Green Circle
Designate yourselves a role, either Sender or Receiver.
The Sender chooses a shape and colour.
The Sender then announces that he has chosen and is ready to send over the image. The Sender, with the intention of telepathic communication in mind, then pictures the shape and colour clearly in his mind without distraction. The Receiver needs to clear her mind so that she can receive the message clearly. The Receiver must not "think" about the incoming shape but rather just call out the first image that comes to mind, while maintaining the intention to receive the telepathic message. That is really all there is to it.
If the Receiver guesses wrong, then swap roles and try again. If the Receiver gets it right, continue and see how many you can get in a row.
Once you start to get the hang of it and you are consistently getting around 5-10 correct communications in a row, which is very good going, you can add an extra shape and colour into the mix and see if you can keep it up.