GOTCHA Challenge

I got this lovely email from Lily. If you follow the link you will be able to find out about what "Gymnaestrada" is. There's a GOTCHA for the first person who can explain what "gymnaestrada" is and tell me what equipment you'd need to take part.

Hi Mr Corlett,
Its Lily here, only one and a half weeks till we go away to Austria and the World Gymnaestrada. If you would like to see what it involves you can look at their website www.wg2007.com , I will write to you about what we are doing there when we go there. And I will tell you about Paris and Disneyland!
Bye for now from Lily