Teens may be on summer vacation, but they seem to be retaining what they learned in chemistry class.

"Bottle Bombs" are made up of a few items we use everyday in our homes, and together they make for a dangerous combination.

Police say these bombs are not new; in fact, they've been around for years, but they're making an appearance on the Western Slope and that has people concerned.

"Children are getting out of control," victim Tara Ramirez said.

Ramirez suffered chemical burns after a bottle bomb exploded next to her.

"My ankle started itching and I looked down at it and I brushed my ankle off and noticed there was a liquid on it," she said. "In the bottom, I found it was actually kind of a clear and jelly substance.  I was like 'what did I just kick?'"

"Bottle bombs are devices that people make with common household items and what they do is they'll leave them outside and sometimes they just wait for someone to pick them up," Kate Porras with the Grand Junction Police Department said.

"What happens is there's chemicals inside and they form a gas and that gas starts expanding to a point where eventually the bottle explodes."

GJPD says these bombs are dangerous and should not be messed with.

"There's potential for damage form the explosion itself but also the chemicals inside can also cause chemical burns," Porras said.

Ramirez says she found the bottle bomb near a playground, and is just glad it wasn't her kids who got a hold of it.

"That could be dangerous, I don't want to have to take them to the emergency room with chemical burns, missing fingers, toes," Ramirez said.

"A lot of people think it's just funny and it might be a fun game, but it's not going to be very fun if you actually end up hurting somebody," Porras said. "Not only because of the injuries but also the ramifications that could come back on you as far as criminal charges and jail time even."

Ramirez says she can't believe this is something we have to worry about on the Western Slope.

"I was concerned because I think of this as a tight-knit community unlike California or places like that," she said. "It did worry me because it's finally making its way to the valley."

Police say if you come across a bottle that looks suspicious or out of place, it's best to leave it alone or call them.

They also suggest keeping track of all your household chemicals to prevent your children from making this and harming themselves or other people.