This collaborative activity was firstly announced (see Word file below).

The work groups from the three schools started working out and recording the riddles. 

After that, all the riddles were compilated.

Before, a short cartoon video were recorded as an introduction:

medprod.ning.com/profiles/blogs/cartoons-1

To sum up, the riddles were collected in this audio ebook, which lets us watch them together: 

medprod.ning.com/profiles/blogs/ridlles-collection

If someboby wants to try, the results can be found in the Word file below.