Triangles, Tetrahedrons and a Kaleidocycle

I meant to post these as I worked but it didn't happen for one reason or another so here's the rest of the triangle project

Side 3

Side 4

All 4 sides in a strip just before they became.....

a tetrahedron

The first 2 tetra's joined

4 tetra's joined, makes an interesting shape

6 joined in a strip and when you joined them together you get ......

a Kaleidocycle or as it's also known a hexaflexagon (I hope the video works!)

One of these was posted on a Facebook group and that was it I had to figure it out, far too impatient to wait for the instructions :)