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The tokens ranged from stuffed animals to wedding rings and lucky stones.
At the start of the experiment, the charms were taken away to be photographed - but only half were returned.
The first daughter also appeared on a panel, where she encouraged women to seek out and mentor other women who would benefit from their knowledge.
Ivanka, who wore a green and floral patterned dress, shared a handshake with Modi on stage at the summit as the plenary session began, coming together to operate a robot that was said to be in control of the room's video display.
The talks were proceeded by a festive dance performance, where four women were perched atop giant Christmas Tree-shaped installations that broadcast digital scenes while four more women in traditional Indian garb performed on either side of the long stage Ivanka Trump is in India at the invitation of Prime Minister Narendra Modi.
Even a good luck gesture - such as crossing fingers - can boost someone's performance in an exam or sporting event.
And astonishingly, telling someone that a golf ball is lucky makes it more likely they will pull off a tricky putt.
Footballers are particularly famed for their superstition.
Former England captain John Terry once admitted to having 50 rituals - including taking the same seat on the team bus, and always listening to the same pre-match music.