Yikes! Is a classic bit of birthday fun ending in too many bumps, bruises and broken bones?
The number of kids hurt while using inflatable bounce houses and moonwalks has risen dramatically since 1995, according to a new study published in Pediatrics.
Researchers found that the injury rate has risen a staggering 1,500% in the past 15 years.
Between 1995 and 2010, nearly 65,000 children were treated for bounce house related injuries, with the years between 2008 and 2010 seeing a doubling of the injury rate.
[Read "Why Parents Should Ground Bounce Houses"] 
Arm and leg injuries were most commonly seen - with fractures making up 27.5 percent of the injuries. Children under five were more likely to have fractures while teenagers were more likely to have sprains and strains. Hospitalization was required for 3.4 percent of injured children.
So how are kids getting hurt?
Well, they are either jumping on top of each other, landing on their own twisted arms and legs, or falling out of the bounce houses, which results in fractures and sprains. In one incident, a 3-year-old suffered facial bruising when a bounce house deflated.
The study's leader author, Dr. Gary Smith, says there is no hard evidence to explain why the number of injuries is going up, but increased use could be to blame.
He shared the following safety tips for parents with CNN :
1. Based on developmental abilities, don't let children under the age of 6 play in these inflatable devices.
2. Having one child play at a time is the safest, but that's not very realistic (or much fun), so only have children of similar age and size play inside these bouncers at one time.
3. Horseplay, flips and somersaults should be prohibited; that kind of play leads to the most dangerous injuries.
4. Always have an adult present when these devices are in use -- but not inside with the children. Adults (parents and/or bounce center operators) should be in a position to observe and intervene if children are engaging in horseplay or doing flips and somersaults.
Has your child ever been injured in a bounce house?