I went to Satrosphere a couple of times over the summer holidays and my kids loved it. Age 2 and 5. Lots of experiments to do and enough to keep them entertained for a couple of hours. Having been there before it moved sites a few years ago was quite surprised to see a lot of the things are still the same as they were 10 odd years ago. It is fun but not good if you want to chill while the kids play. There is a small café attached which is ok, serves decent coffee. They do lots of different demonstrations and shows through out the day aimed at different age groups. There is also a small gift shop. Worth a visit.