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David Hyche started building beeping Easter eggs nine years ago, in an effort to help his blind daughter Rachel participate in an egg hunt.
The idea caught on: he made 40 of the eggs for around $14 that year and organised a hunt for 11 visually impaired children.
The eggs are now made as part of a charity project from the International Association of Bomb Technicians and Investigators, who donate $10,000 per year to provide them to schools for the blind.
"My daughter at four months old lost her vision," he told Fox News. "The kids are able to locate the egg from the sound... Teachers for the blind have informed me that they use these all year round to teach location skills."
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