This year's April Fools' Day marketing stunts feature everything from a grass keyboard from Yahoo to a 5-year cruise from Duolingo and Carnival.

If you see a weird product being announced online today, don't be so sure it's real. Duolingo, Razer, Yahoo and Priceline ...

The prank received a lot of attention ... the stunt worked well. But it left Duolingo with a fairly uninspired effort for April Fools’ Day: The company posted a video on Tuesday about the ...

From Cadbury launching goo sachets to Birds Eye finally revealing what happens to waffle holes, here are the gags that really got us this year.