Awesome object to print!! I love it and I'm sure my niece will too. I just wanted to let people know what to do in case all the print is fused together like it happened to me.
If you are using Cura, search for a setting called "Horizontal Expansion" and give it a negative value. I started with -0.20 until I found -0.06 to be a really nice setting for my printer.
First photo was when that thing was set at 0, I had to apply a lot of force to separate the parts but those little rectangles were really fused together and even using a hot knife I wasn't able to separate them. The second photo was with a -0.06 horizontal expansion. The parts where adequately separated when I remove the print from the bed.