The genetic brain defect causes Zander to have seizures. Some are so severe, he forgets to breathe. Each one takes a severe toll.
"He'll go from walking around okay to crawling and we have to build him back up,' said Jennifer.
Brain surgeries and meds haven't worked. Desperate for a cure, or at least some relief, the Weltons are turning to cannabis.
Dr. Elaine Burns of Southwest Medical Marijuana Evaluation center is one of two doctors who have signed off on Zander's treatment and will also be monitoring his progress and helping guide his dosages.
"Mom and dad will get to know who Zander is. And if that's what this medication can do for them, I'm all for giving it a try," says Burns.
The biggest hurdle now is money.
Jacob is a stay-at-home dad for their three sons. Jennifer is the breadwinner. The cost of Zander's medication, an expected $300 a week, will all be out-of-pocket.
After seeing Zander's story, Harvest of Tempe offered to provide all the cannabis oil Zander will need to ease his suffering.
It will supply Zander's dad Jacob who is now a legal medical marijuana caregiver and Jacob will then administer the CBD oil drops to his son twice a day.
"We exist in order to try and help people. To the extent we're able to do that, we're honored," said Steven White, with Harvest of Tempe.
"It's so nice to see how many people are willing to step out and help, all you need to do is ask for it," says Jennifer.