You can watch the video how to assemble.  

1.  We start by inlaying the colored acrylic pieces into the black inner star. Click each piece of colored acrylic into the appropriate spot. Sometimes you have to press until you hear a click.
2. Take the outer star and click the transparent star into place. 
3. Now click the inner star into the transparent inlay. Press gently until you hear a click. Now the colored star is in place.
4. The star is ready. All you have to do now is attach a string or chain to hang the star.