Having fun

We visited again art museum Emma.  I have a museum card and I can visit  almost any museum in one year so many times I want.
Here are two pieces of art.  On the left again the  famous work of Chiharu Shiota consisting  of 350 km of red thread.
On the right side there is a white board and small faces looking around the board.  The faces disappear of any sudden noise.. My grandson was already like a professional and made many people laugh.  He went on tiptoe near the board and waited almost one minute until the faces appeared and then suddenly jumped up and made a big noise when falling down and then the faces suddenly disappeared.