Theresa, who is only 5 years old, was diagnosed with epilepsy in December 2013.
At the time, her doctors said the condition caused her to be too dependent on her wheelchair.
But the baby is doing so well and is able to climb stairs, despite not having any experience with them before.
So how do we know she’s got the mental capacity to do that?
After Theresa was born, her mother, Christina, decided to take her on a walk to see the sights, and when Theresa was around three months old, she started climbing stairs at her own pace.
She now walks on her own, and Christina says she’s always felt more confident in her ability to climb than most toddlers.
Christina has even had her daughter play on the stairs in the past, but Teresa’s success is all thanks to her mum.
“I can’t believe that her mum has made it this far, but it is incredible,” Christina told Next Big Futures.
“She knows how to make it easier for her to do this.
When she was younger, she was struggling with this and I was really worried about how she would react to stairs.
But she was doing really well and now she is climbing them so well, it’s amazing.”
Christina is hoping to encourage other parents to try their hand at raising their own children on stairs, and to raise awareness about epilepsy.
“It’s amazing how little we do know about epilepsy,” she said.
“There are so many things that we do not know about it.
There are so few resources available, and a lot of parents don’t know what to do with their child.
I want to start educating people.”
Theresa’s mum says that, with the help of Christina and other parents, there are more opportunities to give their kids the opportunity to do what they love.
“Theresa is very strong and independent and I think she’s going to thrive in this environment.
She loves it and enjoys it,” Christina said.
Theresa has also been given a special toy to play with that she loves.
She was given a stuffed bear as a Christmas present, and her mum says it is a great gift for the whole family.
“We love the little bear, and I know she loves it too,” Christina says.
“He’s got so much personality and he loves to chase his little brother and his friends around.”