B 3 I chose the hot air balloon design as that's my favorite option. Unfortunately, it is not truly 2 sided. I cannot fold the hot air balloon side any smaller than full size. It is this other side and design with animals (I've pictured) that is truly modular. You can see the foam wedge in between the larger sections that prevent it from being truly modular on both sides. So just know if you are not opening it all the way, it'll be this print you are seeing and not the hot air balloon design. I don't think the hot air balloon design should be listed as an option since it is not the modular print.