The 1x4 Tabletop Pyramid
This page provides general links to different tools and materials that you might need in order to build your pyramid. I receive a small commission from anything you buy on Amazon, which helps to keep my business going.
Duct Tape -- You don't need anything fancy, just to be able to hold the 1x4 triangles in place while you glue them together. But why not wood color?
Titebond Quick & Thick -- If your pyramid will be indoors, this is the glue I recommend, as it dries clear and can fill small gaps.
Liquid Nails -- If your pyramid will be outdoors, or you have larger gaps between your cuts, then this is what I recommend. If you have a dispenser, you can get this one instead.
You can also find other tools that might be helpful in building whatever pyramids you might choose to make, including things like clamps, tape measures, squares, drill jigs, wood glue, drills, miter saws, circular saws, and much more on this page here.