The magpie outside my place does perch on my arm to eat food, but also engages in a friendly game of "guess which hand the food is in", by giving a gentle peck

The magpie outside my place does perch on my arm to eat food, but also engages in a friendly game of "guess which hand the food is in", by giving a gentle peck (I flip the food back and forth between my hands like a carnival game then close the food in one hand quickly).