Each builder kit comes with 20 squares, 8 triangles, 8 small reinforcing triangles and 90 clips. Kits include a carrying case for easy storage, and a brochure with product information and build ideas.

The opportunities are endless! We provide access to build instructions on the "Discover" page, but we encourage imaginations to run wild with every build created.

We have a few build ideas with step by step pictures on the "Build-it" page (found under the "Discover" tab) of our website. In addition, if you are struggling to come up with ideas for builds use magnetic tiles! Construct a build with the magnetic triangles and squares and then replicate it with your Mighty Fortress materials.

Our kits are made with foam core board, extruded polystyrene between clay coated paper, and secured with a patent-pending plastic clip that gives each build a great strength to weight ratio. The clips are engineered to keep the boards together throughout playtime and beyond. Our fortresses can be picked up and moved, and a simple build can hold up to 20 pounds.

Each square is approximately 20"x20", triangles are equilateral at approximately 19" a side, and support triangles are approximately 7.5" right triangles. The clips are approximately 1"wide x 2" long x 5/8" thick. The box that the materials come in is 20" x 20" x 6."

Our kits are proudly manufactured in Indiana, USA.

We are currently applying for STEAM accreditation with The Toy Association.

Yes, the kit does ship in just the carrying case box. Make sure to follow tracking information if it is meant to be a surprise for your kiddos!