If Twitter launched a new device, a helmet, that would allow users to send a tweet using simple head motions, would you use it?

Millions of Twitter users don't have to worry about that idea - not yet, anyway - because the announcement of a Twitter Helmet was, in fact, an April Fools' Day joke.

The microblogging site made the announcement this morning in a special blog post touting a helmet created with an "impact-resistant, oleophobic-treated glass" that would allow the wearer to tweet by "pecking" their head.

The blog said the helmet would be available this September for $139.99 and also feature accessories like "feather-shaped Wi-Fi and cellular signal boosters."

Twitter sent so far as to create a prototype of the so-called Twitter Helmet and debuted it today on " Good Morning America."

At the end of the show, however, "GMA" correspondent Sara Haines, who had earlier "tweeted" via the helmet, revealed it was all an April Fools' Day prank.