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Rex Features
The instrument was used in a memorable scene in the 1988 film, which featured Hanks and Robert Loggia performing the tune 'Chopsticks'. Inventor Remo Saraceni christened his invention a Walking Piano.
It was handed over to the Please Touch Museum by Joseph and Janet Shein, who purchased it after the film's release.
"We love this piece," Joseph told the Philadelphia Inquirer. "We felt it was a new direction for electronic sculpture."
The couple used to keep the Walking Piano in their music room and allowed visiting children to play on it as a treat for Halloween.
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