I wanted to add some extra fun to the fort building. I created a platform that works with these wall units.
As they do not fit together as well as the seej wall units on purpose, you can knock them down more easily.
Please have fun, I have printed it without supports and it works perfectly. You can build underneath or above it.
Next one will be one with Lego/MegaBlok platform adaptors as my kids seem to be having as much or more fun with making forts with the pieces and not playing against each other.