Ahmed didn't make the clock. This is all bullshit.
"So I turned to eBay, searching for vintage alarm clocks. It only took a minute to locate Ahmed’s clock. See this eBay listing, up at the time of this writing. Amhed’s clock was invented, and built, by Micronta, a Radio Shack subsidary. Catalog number 63 765."
Reverse Engineering Ahmed Mohamed's Clock... and Ourselves.
So the kid is a fraud.