WILL THE SHARKS GO FOR A FORT BUILDING KIT FOR KIDS THAT COSTS $199? FIND OUT ON "SHARK TANK," FRIDAY, APRIL 18

An Update on Breathometer, a Breathalyzer App That All the Sharks Invested in During Season 5

"Episode 529" - Two Dallas entrepreneurs demonstrate their smart light bulb which can be programmed from a mobile phone for home or business, a father/son team from Las Vegas have a high-tech replacement for a cork that helps preserve wine and olive oil, parents from Washington, D.C. unveil their subscription service of carefully-curated children's books, but they only have 85 subscribers to date, and a Sarasota, FL woman has a fort-building construction kit for kids that makes castles, pirate ships and cars. Plus, a follow-up on Breathometer, one of the show's most popular deals�5 Sharks invested in it earlier this season. It's a breathalyzer app that works with your smart phone to check if you are over the legal alcohol limit and if you are, can call a taxi for you, recommend a hotel and more. This episode of "Shark Tank" airs FRIDAY, APRIL 18 (9:00-10:01 p.m., ET) on the ABC Television Network.

The Sharks in this episode of "Shark Tank" are Mark Cuban, Lori Greiner, Barbara Corcoran, Robert Herjavec and Kevin O'Leary.

Mark Burnett, Clay Newbill and Phil Gurin are the executive producers of "Shark Tank," which is based on the Japanese "Dragons' Den" format created by Nippon Television Network Corporation. The series is produced by Sony Pictures Television.

"Shark Tank" is broadcast in 720 Progressive (720P), ABC's selected HDTV format with stereo sound. This program carries a TV-PG parental guideline.

For more information on "Shark Tank," visit ABC.com.