Gather items with Blippi and play "Sink or Float." The Blippi "Sink or Float" game is a fun science experiment for kids, helping Blippi to explain density and buoyancy. First, Blippi must fill a tank with water. Then he goes out to find some colorful objects to test.

The Blippi Sink or Float game is a fun science experiment for kids, helping to explain density and buoyancy. In this video, Blippi takes us to gather some interesting items, and still finds time to get dizzy playing on the playground. Then, he’s back indoors and ready to see which of the objects will sink... or float!

Blippi plays the Sink or Float game, a fun experiment for kids that explores density and buoyancy. This is the moment of truth when Blippi tries out his objects in the water tank. Do dandelions and glue float or sink? We’re about to find out!

Blippi tries out his remaining items in the "Sink or Float" game, including a pair of Blippi glasses, a paintbrush, and how about a dump truck load of slime!

Blackbeard’s story almost seems mythological, but it's actually based in truth. This video elaborates on the man Edward Thatch, starting with his origins on the island of Nassau to his reign of terror in the Caribbean.

Continuing to pirate audaciously, Blackbeard sails up the eastern coast of the United States, where, incredibly, he secures a pardon from the Governor of North Carolina. Setting up base on an island, he is soon plundering ships again, but by now has made some determined enemies and faces capture, dead or alive.

Rap artists the Black Eyed Peas team up with singer Shakira and DJ David Guetta for “Don’t You Worry," a song that encourages us to aim for the stars and not be held back by worries or doubts.

Birdy is a singer, songwriter, and accomplished pianist from the south of England. This song, “Wings,” from the album The Fire Within is her biggest hit to date, and has been featured in movie trailers, series, and commercials. The video shows Birdy with guests at an extravagant party at a mansion, complete with masks, fencing, and horses.

By following honeyguides, a species of bird, people in Africa are able to locate bees’ nests to harvest honey. Research now reveals that humans use special calls to solicit the help of honeyguides and that honeyguides actively recruit appropriate human partners. This relationship is a rare example of cooperation between humans and free-living animals.

In the next 35 years, we’ll have to produce more food than all of the world’s production over the last 2000 years combined. So what will the farms of the future look like?

Nick Grimshaw takes pop superstar Harry Styles to connect with some people who don't care much about his fame or musical talent.

The star of the film Elf, Will Ferrell, returns to Billy on the Street for a very special holiday lightning round! Watch how New Yorkers react when Will and Billy demand holiday cheer!

Chris Pratt is a big star in the US, having acted in "Guardians of the Galaxy" and many other movies, but do New Yorkers even care?

In this week's Lightning Round, Neil Patrick Harris and Billy Eichner take to the streets to find out how New Yorkers feel about the end of the series How I Met Your Mother.

Lindsay Lohan and Billy Eichner are very upset about the end of the TV show "How I Met Your Mother." Watch them let out their feelings by destroying a car.