Day 4: What to do on rainy days?

Yesterday the wheather was sunny - today it has been raining all the day. It is summer and I really would like to sit in our teracce and enjoy life with fresh air and sun. But that was not the case today. We have been watching tv and I got really bored with that - even I don't have tv in my "love nest" in Helsinki.

Then I remembered: I have started this puzzle for some time ago and it is quite challenging - like puzzles usually are.