My son is almost 5 and in a Graco Nautilus. He is on the top slot but will still fit harnessed for a while. He's almost 46" and around 45lb. I plan to keep him harnessed for another year-ish and then use the nautilus as a booster but I'm thinking about starting booster training with him in the next few months. My thought is that once he's in kindergarten he'll probably be asked for playdates and I don't want to lumber the parent with the huge heavy nautilus. Plus, I don't really trust other people to install it properly. I think a lightweight hbb would actually be safer, as long as my son knows how to sit in it. Plus, I sometimes have other kids in my car and I'd like to have a seat for them.
Can anyone recommend a cheap, lightweight, easy to use hbb that fits well into the 3rd row of a 2007 Mazda5? Must be available in Canada.