The long black part on the left?
Looks like some parts of a moon rover. Is it the darker grey gear?
Is it the small yellow round thingy in the middle?
No
No
Maybe it would be easier if I told you what it was. Itās a basic gearbox with a 1:1 forward and a 1:1 reverse. So if you can manage to put it together in your head (Iād be very impressed if you do) then youāll find the odd thing.
Ahhahah. And I was wondering, why I couldnāt manage to put it together into smth. adequate. 
You overestimate meā¦ wonāt have a chance.
If you can figure out how to arrange the gears into the ratios then you can probably figure out the casing.
That means itās one of the light gray gears.
Nope.
Iāll give you guys a view of the built thing and an exploded view when I eventually reveal the answer.
Is it the light gray ladder like shaped thingy? There are 3 of it but that seems a bit off for some reason. Maybe one of them is the odd one out?
Nope, theyāre all the same.
ok thenā¦ it isā¦ the table!
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No, itās not the table. The pieces are the subject of the pic.
the yellow piece over this white round (kinda) wheel
Iām clueless on this one 
Not that @Gatsie
Do you mean the yellow horizontal thing above the beige conical gear @Susannchen ? (there is no white gear).
Oh the horizontal object you mention looks white on my screen as well.
Soā¦ Is it that white thing below the one I circled?