Both of Kayzah-Shae's parents moved to Auckland during the hospital stint, staying in the Ronald McDonald House initially and later moving to motels around the hospital.
"Kayzah-Shae arrived [in Brisbane] about four weeks ago," Ms Shillingford said yesterday.
"We're loving it here. I couldn't go back to that house. Too many memories."
She said the young boy was doing "really well".
"He's got a long way to go but he's doing good.
"Hopefully he'll get to return to school next year but we're not too sure. We'll need to have him assessed but it would be good."
Rehabilitation is continuing for Kayzah-Shae who was placed into an induced coma after the accident and had surgery to reduce swelling.
He then spent more than a month in a rehabilitation centre in Auckland.
"We're pretty much just continuing with what he was doing before, just little things like reading and playing memory games, things like that. We're noticing progress, slowly but surely."