Now Playing: Mom's Get Real: The Death of Recess?

Now Playing: Ricki Lake Takes on Childhood Obesity

Now Playing: Eyebrow guru-to-the-stars spills her secrets on how to get killer brows

Now Playing: High-protein diets are trendy, but how much protein do you really need?

Now Playing: More than 2 dozen tornadoes tear through Iowa

Now Playing: Eyewitnesses describe deadly duck boat accident

Now Playing: At least 11 dead in Missouri duck boat accident

Now Playing: Triple-digit heat expected

Now Playing: Trump plans to invite Putin to the White House

Now Playing: Reward for campground killer jumps to $30K

Now Playing: Arizona landscapers struck by swarms of bees

Now Playing: Papa John's founder accused of sexual harassment

Now Playing: Parents warn of online gaming scammers on Fortnite

Now Playing: 'The Brady Bunch' house up for sale after 50 years

Now Playing: Camila Cabello performs 'Never Be the Same' live on 'GMA'

Now Playing: What to know about heat stroke

Now Playing: Co-workers donate vacation time to new moms for maternity leave

Now Playing: Shaquille O'Neal swims with sharks this year during 'Shark Week'

Now Playing: Camila Cabello rocks out to 'Consequences' on 'GMA'

Now Playing: Camila Cabello performs her smash-hit 'Havana' on 'GMA'