(G1) Dream Castle has a smaller footprint, but it's dang fragile. I wouldn't pick it if you're worried about tripping over one / don't have a secure place to store it and have an extremely careful, older child. The hinges in particular are not sturdy enough to stand up to rough play. If you get just the base part (two main towers with drawbridge) it'd probably be a little safer for a kiddo, but a G3 castle of any kind is far less likely to shatter.