What was supposed to be a fun summer field trip turned into a nightmare for two Oklahoma brothers.

Seven-year-old Connor and 5-year-old Trey Broadway were sunburned so badly, they had to be airlifted to a Texas children's hospital for treatment.

The brothers attended a day care field trip to a water park in Vinita, Okla. on Friday.

When their mother, Shaunna Broadway, went to pick up her boys from the day care, they were both crying because huge, painful blisters had bubbled up on their shoulders and backs.

“I got off work at 5 p.m. and went to pick them up, and they were clearly burned,” mom Shaunna Broadway told BuzzFeed. “[The employees] were actually making fun of my older son, because both boys got sunburns but he was being a ‘baby’ and crying about it.”

The family claims that employees with Happiness Is A Learning Center didn't bring sunscreen to protect the children on a day when the heat index was about 110 degrees.

Trey suffered second-degree burns while Conner had third-degree burns.

The brothers' aunt posted photos of the severe burns on her Facebook page. You can see them here, but they are graphic and could be disturbing to some.

A Stroller Maker's Bikini Model Ad Did Not Go Over Well With Moms

Daycare Nightmare: 4 Kids Hospitalized With Suspected Drug Overdoses

'I Can Smell It': Resident Told to Keep BBQ Smoke in His Own Yard?!

Day Care Staffer Snaps Photo of Child Duct-Taped to Mat

Mom Charged With Murder for Feeding Infant Drug-Laced Breast Milk