Well, according to the poster in the metro station, Biodome with the image of Caiilou ends this coming Sunday, that is three days away. My daughter and i went to the Biodome last Sunday. It was true that there is a big Caillou and some activities related to Caillou. Many kids were there, and fish were wonderful thought not of a big variety. May you have a good time with your child.
I am not sure then. My daughter is 3 years and half. I also saw lots of babies in their carriages in the Biodome. Your daughter is free, but you have to pay around 10 dollars for one adult.