Watch the Prince play a vuvuzela
Prince William has been taught how to blow a vuvuzela, during his trip around Africa.
The plastic horns have become the sound of the South African World Cup, with crowds playing them in every match.
But the Prince may need a few more lessons before he watches England play Algeria on Friday as he struggled to get a note out of the horn!
But his 11-year-old teacher blew the horn so loud that William had to put his finger in his ear.
When he was given the vuvuzela, the Prince said: "I can't blow it. OK, I will give it a go."
He hardly managed to make a sound, and added: "There you go - embarrassed myself again!"
William and his brother Prince Harry are visiting African charities on their visit, before catching some World Cup football in South Africa.