Psychic Sensor Imaging (PSI) is an easy tool to help people develop their telepathic abilities and is a group activity.

One person creates a thought in their mind and projects it to the other members of the group.

They can either close their eyes to look for images - or listen to their thoughts - after which they tell the rest of the group what they see, hear, and feel.

The person who has projected the thought should not tell anyone what it was until everyone has a turn at giving their impressions.