Top 10 April Fool's Day pranks of the year

International companies also came up with creative ideas to prank and trick their users.

Like every year, it happened this year too. Here's our pick of the top 10 April Fool's Day 2013 pranks.

BMW's history of BMW April Fools adverts continues for 2013 - this year, with a royal baby due this summer, BMW announced the launch of the limited edition BMW P.R.A.M. (Postnatal Royal Auto Mobile).

Virgin announced the world's first glass-bottomed plane on April 1 - created to ensure passengers can enjoy both an unparalleled flying experience, as well as a selection of stunning landscapes from the comfort of their seats.

Experta at CAP Automotive pretended to be puzzled over how to publish essential details of a vehicle, which is claimed to be 'the most environmentally friendly car in the world' - because it is powered by air. It says the vehicle weighs 400kg, and is built by the Shanghai-based Yuren Automobile Co.

Google introduced a video announcing the all new Gmail Blue e-mail client. The Gmail Blue announcement is another April Fool's prank from Google. The video says, the compose button will turn blue while you click on it to create a new message. Everything will appear blue from labels to body text in Gmail Blue, explains a Google executive in the video.

Every year Google tries to outdo itself in pulling April Fool pranks. The hoax Google product launch of April 1, 2013 is Google Nose, which Google says is "The new scentsation in search".

In tune with the April Fool's Day tradition YouTube posted a video announcing that the eight-year-old site that is now the world's most popular online video destination is downing its shutters for a decade. But before it deletes all those millions of hours of video, YouTube has also empanelled judges to select that one definitive video that and the the winner will be declared when the website goes back online in 2023.

With the view to befool users on April 1, Google announced Treasure Maps, which it says is our Beta Maps technology.

Twitter announced a two-tiered service. The company said, everyone can use our basic service, Twttr, but you only get consonants. For five dollars a month, a user can use the premium Twitter service which also includes vowels.

The Guardian newspaper announced a pair of web-connected "augmented reality" spectacles that will beam its journalism directly into the wearer's visual field, enabling users to see the world through the Guardian's eyes at all times.