Mum Kylie Buschgens was dumbfounded when her daughter Cali, 10, was told she could no longer do cartwheels, even on the grass.
"She came home from school a couple of times and said `I got in trouble for doing a cartwheel'," The Northern Territory quoted Buschgens, as saying.
"I thought she meant that it was wrong to do it on the concrete, but they made an announcement at assembly that gymnastics was banned," Buschgens added.
Cali said cartwheels made her happy because she wasn't interested in other sports.
Her friend was busted and punished by the cartwheel cops this week.
"We had to practise for a play and she did one on the grass," Cali said.
"Two teachers took her upstairs and she had to sit down for the rest of the day and not do anything," Cali added.
Cali said now she wasn't allowed to do cartwheels, she and her friends would 'sit around and do nothing' during school breaks.