The parents of a toddler recovering from a critical brain injury took him home Friday night, but he returned to the hospital Monday.

"Pray pray pray. In ambulance on way to hospital," Tripp Halstead's family posted on Facebook around 9:30 a.m. Monday.

Later in the day, the family said they didn't know what was wrong and that doctors were still running tests on the boy.

Tripp has been in the hospital since Oct. 29 when a tree limb fell on his head at outside his daycare in Winder. His family says he's had four brain surgeries and three procedures in March alone.

Click here to watch videos and read stories about his recovery.

The Halsteads said returning home with Tripp on Friday was the greatest moment since October, but over the weekend, some of the symptoms that worried them in the hospital returned.

Meanwhile, local businesses continue fundraising efforts to help the Halsteads with medical costs.

On Monday afternoon, three Chick-fil-A restaurants in Paulding County are donating 10 percent of their sales to the family.