"Four days after the operation Tal went for physio and he crawled away very fast, the doctors were amazed because he had just had major surgery."
Through their fundraising appeal to allow Tal to have the operation the family have become friends with cerebral palsy sufferer Evan Hansen, and his parents, who had the same operation as Tal in December.
"Tal loved Dr Parks and he went to him and gave him a huge cuddle and said 'Thank you for giving me new legs.' * For more information visit www.talsgoodfeet.
* Taliesin Campell with dad Jon, pictured at their home after Tal's operation in the US
Tal has regular physiotherapy and also attends Bobath Children's Therapy Centre in Whitchurch, Cardiff, for treatment.
They set up a website detailing Tal's condition and what they hoped to achieve, as well as a Facebook page where they have been receiving messages of support.
After the operation Jon wrote on the website www.talsgoodfeet.org: "Writing this from the paediatric intensive care (PICU) ward where Tal is recovering well.
"We met Tal's nurse, his nurse practitioner, the anaesthetist, the anaesthetist's assistant, Dr Park's resident and a guy called Tyler whose job was to make sure Tal knew what to expect and to allow him to pick his smell for his anaesthetic gas and give him a mask to play with.
"Tal was taken to theatre a little after 7am and we were given hourly updates on his progress.
Then 30 minutes later we were allowed into recovery to escort Tal up to the PICU.
Tal now faces physiotherapy in the US and when he is back home next month.