In honor of the 132nd birthday of the inventor of the zipper, Gideon Sundback, Google unveiled its latest Easter Egg for Tuesday's Google Doodle, a full page zipper than unzips to reveal search results on the search page for Sundback, joining other Easter eggs like do a barrel roll.

By simply logging on to Google's homepage, users can unzip a zipper with their cursor and watch as the full screen unzips to search results for Sundback. For the many amused by the latest trick, this is not the first time Google has left tricks known as Easter eggs for Google users.

Back in November, Google unveiled do a barrel roll, which spins your screen and turns it temporarily upside down in one of the many easter eggs planted by engineers. The neat trick went viral after users created memes and posted on Twitter about the egg. Similarly, Google launched a special Google Doodle in honor of Thanksgiving 2011, where users could customize a turkey with colors, feathers and accessories, and let it snow for Winter 2011, where snow falls on the screen.

According to Google, these easter eggs are inside jokes done by engineers working at Google headquarters to amuse users.

A Google spokesperson confirmed to Mashable that do a barrel roll' was created by a Google engineer with the primary goal of entertaining users -- while showcasing the power of CSS3, the newest version of the skin.

Haven't seen any of Google's Easter eggs? Here are some of the secret tricks hidden by Google, including the zipper and the popular do a barrel roll.

Do a barrel roll

Type do a barrel roll in the search bar and click I'm feeling lucky or hit the Enter key. Watch your screen flip around completely.

Gravity

Type Google gravity in the search bar and click the MrDoob website link. Everything will fall from your screen like gravity.

Tilt

Type tilt in the search bar and click I'm feeling lucky or hit the Enter key. Watch your screen tilt slightly to the right.

Askew

Type askew in the search bar and click I'm feeling lucky or hit the Enter key. The screen will appear slightly askew.

Epic

Type epic google in the search bar and click I'm feeling lucky or hit the Enter key. Font size will appear epicly big.

Weenie

Type weenie google in the search bar and click I'm feeling lucky or hit the Enter key. Font size will appear super small.

Flight Simulator

In Google Earth, click on Tools > Enter Flight Simulator, and you can simulate a flight.

Spam

In the Gmail spam folder, a recipe for Spam.

Hacker

Type google hacker in the search bar and click I'm feeling lucky or hit the Enter key to see how Google would look if it were hacked.

Reader Ninja

In Google Reader type on your keyboard: 'up, up, down, down, left, right, left, right, B, A' and a ninja will appear on the left side of the screen.

Pirate

Search 'Google Pirate' or go here and the Google homepage is written in pirate-speak.

New Google Doodle.
New Google doodle on Gideon Sundback. Google Screen Grab
Do A Barrel Roll
Google’s latest hit search term, ‘Do a Barrel Roll’ has gone viral, with millions of people searching the term, but what else is out there? Here are our ten favourite Google Easter eggs, jokes and hoaxes.Do a barrel roll typed into Google search results in exactly that, Google rolls and eventually collapses. All text and buttons are drag and drop-able and surprisingly the search bar still works! IBTimes
Google Gravity
Google Gravity (I'm feeling lucky) Google
Google Tilt
Tilt Google
Ninja
There's a Ninja in your Reader Google
Pirate Google
Navigate to http://www.google.com/webhp?hl=xx-pirate and the Google homepage is written in pirate-speak, with 'Log in' replaced by 'Sail into port'. IBTimes
akew
Type “askew” in the search bar and click I’m feeling lucky or hit the “Enter” key. The screen will appear slightly askew. Google
epic
Type “epic google” in the search bar and click I’m feeling lucky or hit the “Enter” key. Font size will appear “epicly” big. Google
weenie
Type “weenie google” in the search bar and click I’m feeling lucky or hit the “Enter” key. Font size will appear super small. Google
flight
In Google Earth, click on Tools > Enter Flight Simulator, and you can simulate a flight. Google
spam
In the Gmail spam folder, a recipe for Spam. Google
hack
Type “google hacker” in the search bar and click I’m feeling lucky or hit the “Enter” key to see how Google would look if it were hacked. Google
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