This is a very interesting place to visit for discovering more about everyday use of energy. The museum is quite small (a good thing; sometimes!) and has only 2 floors with an open roof that is entirely covered in green grass. Its really nice to walk on the roof as you can see the beautiful bay and the surroundings. This place is more about showcasing what part different forms of energy play in our lives and realize how much technology & efforts go into making this work. Unfortunately, most information (actually all of it!) is in Japanese. So, if you do not read Japanese, it becomes a bit tricky to figure out some of the demos. At the reception, you can ask for a leaflet in English which helps a bit. The children love this place, because there are so many interesting things and if you let them discover, they will come up with questions which will help them understand & learn important aspects of everyday science that would take hours of boring teaching otherwise! It is free for all, and open everyday including week ends.