What in the world those orbs are?

former-member · 2013-12-29T01:15:17.000Z

Ok so I'm seeing those smallish star wars sets in TRU like 9678 and for the world of me I cannot figure out what is the function and purpose of this differently colored orbs, spheres whatever they are. Is this a x-mas tree ornament? I can't figure out the purpose of it. Can anyone enlighten me. Thanks.