Let's give 'em a fair chance! + Strange instruments

As many of you in this forum I'm a huge Queen fan. As many I'm too young for the possibility of joing a QUEEN concert in their classic line-up. I really do adore the incredible work of Mr. Mercury, Deacon, May & Taylor.
But for fuck's sake: Let's give QUEEN+PR a fair chance. I'll do! I'm going to see them on Thursday in Munich without any prejudice in my mind. Let's get surprised! It's not Queen - if we keep this in our minds, I think we won't get disappointed!

Question: Hope you can help me! If you listen to "dreamers's ball" on LIVE KILLERS, you hear two strange instruments.
a) Is this a Kazoo?
b) Who played it? Tried to figure this out, but I'm not sure yet!

Can anybody help me?

As far as I know, it's only mouth, no kazoo. There's an interview where Roger explains it.

Btw, see you in Munich! I'm really locking forward to this!!!!

Cheers!

i don't mean this in a horrible way as some, but does it not say it in the booklet?