The five deltahedra with 7 vertices from a common net (1 of 4)

Just a toy. See this page for copious details. The figure here is a manipulable version of the object in the first movie on that page.

Grab it, turn it, spin it with the mouse. Double click the figure to stop the animation.
You can hold the RIGHT mouse button down and drag it HORIZONTALLY across the screen to sequence through the frames.

(Please be patient while the applet processes some compressed data.)

The images were produced using Mathematica and converted to the animation with LiveGraphics3D.
Martin Kraus's terrific LiveGraphics3D applet, long dormant due to recent Java concerns, is brought back to life here using the CheerpJ compiler, which turns Java into Javascript!