Highchairs are safe places to contain young kids while they eat, but increasingly children are getting hurt while in highchairs -- sometimes severely.

Harper, 3, has outgrown a highchair, but about a year ago, she was strapped into her highchair seat ready to eat lunch when her mother, Kelli, turned her back for a second and heard a deafening thud.

"I looked back and what she had done... she had flipped over," explained Kelli Waggoner.

Harper had pushed away from the kitchen island, tipping the entire chair over. Harper ended up with a hairline fracture on her skull. She is one of nearly 10,000 young children severely injured in a highchair every year.

"Far and away, the most common mechanism of injury is a fall," said Dr. Gary Smith.

Smith and his team at Nationwide Children's Hospital in Ohio analyzed the annual number of highchair-related injuries that required emergency medical care.

"This was an eight year study and over those eight years, the number of high chair related injuries among young children increased by over 20 percent," he said.

Brain injuries like concussions were the result of most major falls. The biggest danger is when kids aren't strapped in properly.

"The important thing is the crotch strap," said Tracy Mehan of Nationwide Children's Hospital. "You want to make sure that this strap is here because it helps keep the child in the chair so they don't slide out from underneath."

Some injuries may have been associated with recalled highchairs. You can check to see if your highchair has been recalled by clicking the link.