Hidden Sound 9
At Parco della Dogana, after the swing, there’s a brick house and, in front, a big tree.
This place is very good for this listening.

Drawing by Giulia, 4 years old
Children's clues
It’s in a park not so far from the school.
It’s a low sound-noise because sometimes there is RUM sometimes there is CIP.
To hear it, we lay under the tree near the swings with our eyes closed and in silence. If you talk it runs away.