Thank you so much for the kind compliments. My bro will be happy to hear them.
P.S. How durable are these? Will they unfold themselves over time or are they made to last?
The folds are tight so, if kept safe, it should last till the day you (or maybe your children) decide to unfold them. They are also coated with an acrylic protectant that makes it more resistant to moisture and gives it a nice dark tone.