I erased this post by mistake and I made it again.
After Atomium we went to Mini Europe park. Very nice, pleasant and fun way to spend an afternoon in Brussels. The entire complex is full of small restaurants, each one of them has a flag of one EU member state. We paid cca 13 Euros for a ticket per person, which seems expensive, but when you see what this park is, how much work is needed to create and maintain something like this, it will soon become clear that the price is quite appropriate for what's offered to the public. Walk through this impressive and not so small park has taken its toll. We were very tired and we made a break to eat something, drink and rest.
What followed was a visit to Chinese Pavilion and Japanese Tower located in the park Laken. We caught the last bus and polite driver explained us everything we wanted to know and left us, after a short drive, right in front of the park. We were too late in order to enter the pavilion, but what we found there was fascinating. Some kind of feeling that you are in Brussels, in the center of Europe, and at the same time on another continent in a completely different culture?! Oddly, but nice!!!