"Lego Star Wars II" question

[Michael24]

A question that's perhaps three or four years too late, but oh well. Does anybody know what the object circled in the image below is? I can never seem to pick it up, move it, shoot it, whatever, and I'm curious as to what it is. The manual and a couple online FAQs I found offer nothing. Anybody?

http://img46.imageshack.us/img46/7055/legosw2.jpg

[DarthGonzo]

I believe you get a Lego canister if you uncover three of them. Or something.

[Michael24]

The little Minikit Canisters like this?

http://guidesmedia.ign.com/guides/694419/images/legosw_item_canister.jpg

I've gotten all the ones for that particular chapter, but if that's what those items do, I guess they just still appear regardless. Thanks. It was driving me crazy. Haha!!