The song was written by Otto Teich and its title is "Die Holzauktion" (The Wood Auction). Sometimes it's also called "Im Grunewald ist Holzauktion".
The lyrics and a midi file can be found here:
I've been trying to get this song for ages, but it seems there's no way of getting it without buying it! I found a short preview on
I hope I was able to help you a bit. I'll keep on trying to find this song...