Nu Sxool, who are based in Port Talbot, visited Birchgrove Primary School to show off some of their new moves.
Judges Simon Cowell, Alesha Dixon and David Walliams were impressed by the group, who are aged between 10 and 16, when they auditioned for them in Cardiff.
The youngsters are now keeping their fingers crossed to see if they will be among the lucky few who have been chosen to go through to the live semi-finals on Saturday.
Birchgrove's foundation phase leader Anne-Marie Adkins said the children really enjoyed the visit from Nu Sxool.
"One of the dancers Thomas Carsley is a former pupil from the school," she said.
"His sister is at our school and his mum also works here.
"They did their audition dance and it was so exciting. The children were gripped. They loved all the flips and jumps.
"The group members also came out individually and showed some of their free-style moves.
"They also showed their dance which they will perform if they get through to the live shows."
Mrs Adkins said the schoolchildren also had the chance to ask the group some questions.
"They asked how many hours they practiced, and if they were nervous about doing the flips," she said.
They also asked about meeting Simon Cowell.
"It was lovely for the children to see that through hard work that things can be achieved.
"We are now telling everybody to vote for Nu Sxool."
Choreographer Terry Michael said they were visiting as many schools as they could over the next few days.
"We are trying to cram in visits to as many schools as possible," he said.
"We are going to the schools that Nu Sxool go to and their past schools.
"They are really enjoying it."
So come on everyone in Birchgrove we need to vote for Nu Sxool - tell your family and friends to vote too.