A curious, energetic, smart, outgoing and thoughtful little boy.

That’s how family, friends and teachers say they will remember 5-year-old Thomas Cooper who tragically died inside a hyperbaric chamber at a medical facility in Troy, Michigan, last month.

The descriptions form part of a heartfelt obituary written about Cooper ahead of a memorial visitation held on Thursday, about two weeks after he died. 

Cooper was receiving treatment inside a chamber, a pressurized container containing 100% oxygen, when it suddenly exploded at The Oxford Center at 165 Kirts Blvd.

CELEBRITIES LIKE BIEBER, BIALIK ARE USING HYPERBARIC OXYGEN THERAPY: HERE’S WHY IT’S TRENDING

Police and fire officials said he was dead inside the chamber when they arrived on the scene, while his mother Annie, who was also inside the room, suffered injuries to her arm.

Cooper, who was in preschool, was always on the move and loved looking out for his younger brother, who was his best friend, according to the obituary.

"His favorite thing to do was play Minecraft on his Nintendo Switch, as he loved to show his Mommy and Daddy the things he could create," the tribute reads.

"His favorite activities were running, jumping, rolling and stomping … He wanted to grow up to be a chef because that meant he could ‘cook with Mommy and Daddy and stay with them forever.’"

The boy was receiving treatment for sleep apnea and attention-deficit/hyperactivity disorder at the Oxford Center, James Harrington, an attorney for the family told NBC Washington. 

DOCTOR LOSES LICENSE OVER OXYGEN CHAMBER FIRE THAT KILLED 2

The chambers are used to provide Hyperbaric oxygen therapy (HBOT) and a typical chamber can hold one person. It requires the patient to lie down in the tube-shaped device that looks like an MRI machine and breathe the oxygen. A hyperbaric chamber contains up to three times the amount of oxygen than a normal room.

Harrington said the boy’s parents were hopeful the services would improve his quality of life. 

"This wasn’t some type of lifesaving measure that was absolutely needed," Harrington told the outlet. "It was just a mother who was trying to help her son with some conditions that he had and was promised that with these conditions and this treatment, that they would be able to help."

"Annie was trying to help her child as any parent would — as good parents do."

Harrington, who is a managing partner of Fieger Law in Southfield, Michigan, said the boy had received multiple sessions of hyperbaric oxygen therapy at the center before tragedy struck.

It’s unclear what caused the chamber to explode. The family intends on filing a lawsuit to prevent a similar incident from taking place again, Harrington said, adding that the boy’s parents are "absolutely devastated."

The obituary also mentions that Cooper loved to make art and was constantly curious about the world around him and liked to know how things worked.

"At night, he liked to listen to audiobooks as he tried to go to sleep, with some of his favorites being Yoto Daily, Charlie and the Chocolate Factory, and James and the Giant Peach," the obituary reads.

As well as being used to tackle sleep apnea and attention-deficit/hyperactivity disorder, the devices are also used to treat a variety of other health problems, including carbon monoxide poisoning, diabetic foot ulcers, anemia, infection of the skin and bone and vision loss.

Such devices require FDA clearance to ensure that they are approved to be used as intended and are safe and effective.

HBOY is also well known for treating scuba and deep-sea divers affected by the rapid change in pressure around them, according to the FDA. 

In a statement to the Detroit Free Press immediately after the incident, The Oxford Center spokesperson Andrew Kistner wrote that the cause of the explosion is unknown.

"As law enforcement officials have shared, at our location in Troy, Michigan this morning, a fire started inside of a hyperbaric oxygen chamber. The child being treated in that chamber did not survive and the child’s mother was injured," the statement reads.

"The safety and wellbeing of the children we serve is our highest priority. Nothing like this has happened in our more than 15 years of providing this type of therapy. We… will participate in all of the investigations that now need to take place."

The location is temporarily closed while authorities investigate the deadly incident, NBC Washington reported. No charges have been filed, per the outlet citing police. 

In May 2009, an explosion of a pressurized oxygen chamber killed a 4-year-old and his 62-year-old grandmother. Authorities said a blast dislodged a tube attached to the hyperbaric chamber, which resulted in an explosion and flash fire, according to CBS.

A federal judge in Washington on Friday handed Elon Musk's government efficiency team a win by declining a request to temporarily block it from accessing sensitive data from at least three federal agencies.

Unions and nonprofits attempted to stop Musk’s Department of Government Efficiency (DOGE) from accessing records at the Departments of Labor, Health and Human Services and the Consumer Financial Protection Bureau.

U.S. District Judge John Bates wrote in an opinion that the government was likely correct in categorizing DOGE as an agency, thereby allowing it to detail its staff to other government departments. 

LAWSUIT TRACKER: NEW RESISTANCE BATTLING TRUMP'S SECOND TERM THROUGH ONSLAUGHT OF LAWSUITS TAKING AIM AT EOS

However, Bates called his finding a "close question," noting that the government did not want DOGE to be considered an agency for purposes of another federal law, which would subject it to open records requests.

Bates, who was appointed by President George W. Bush, said DOGE was a "Goldilocks entity: not an agency when it is burdensome but an agency when it is convenient."

"Plaintiffs have not shown a substantial likelihood that [DOGE] is not an agency. If that is so, [DOGE] may detail its employees to other agencies consistent with the Economy Act," he wrote in part.

The newly minted agency, a key promise of President Donald Trump’s reelection campaign, is aggressively slashing government waste when it comes to government spending. It was created via executive order and is a temporary organization within the White House that will spend 18 months carrying out its mission.

'WASTEFUL AND DANGEROUS': DOGE'S TOP FIVE MOST SHOCKING REVELATIONS

The Justice Department has argued that the DOGE personnel in question are "detailed" U.S. government employees who have access to the information under provisions of the Economy Act.

Musk hailed the decision by reposting the news on X with the caption: "LFG," an abbreviation for "Let’s f---ing go." 

Judge Bates suggested earlier Friday that DOGE's creation and its hierarchy were "odd," noting that it "was created in a way to get it out of OMB [Office of Management and Budget] and instead answering to the chief of staff of the president."

DOGE "took great effort to avoid being an agency, but in this case, you're an agency," he said of DOGE. "It just seems to strain credulity." 

Attorneys for unions representing Labor Department employees argued during last week's hearing that, absent court intervention, DOGE could access protected agency information, including the financial and medical records of millions of Americans, as well as employee safety and workplace complaints.

The plaintiffs noted that Labor Department systems contain sensitive information about investigations into Musk-owned companies Tesla and SpaceX, as well as information about trade secrets of competing companies, sparking concerns about Elon Musk's possible access to the information.

Attorney Mark Samburg argued that allowing DOGE access to this information could have a "chilling effect" on new employees coming forward, due to fear of unlawful disclosure or retaliation.

"The sensitive information of millions of people is currently at imminent risk of unlawful disclosure," Samburg said.

The plaintiffs had urged Judge Bates to grant a temporary request to block DOGE's access to the information, which they said would "force the agency to implement a more thoughtful process."

Separately, on Friday, a federal judge extended a temporary order blocking DOGE from accessing payment systems within the Treasury Department.

That extension came after 19 state attorneys general filed a lawsuit claiming DOGE illegally accessed the Treasury Department’s central payment system at the Trump administration’s behest.  

Fox News’ Brie Stimson and Reuters contributed to this report.