This is the 7583rd most frequent Polish word.
kłeczek
The Polish word "kłeczek" is not commonly used or may be a misspelling. It does not have a clear definition in standard Polish vocabulary.
Here, 'kłeczek' refers to a small, crumpled piece of some material, in this case, paper, describing its small size and crumpled nature.
Na stole leżał mały kłeczek papieru.
On the table lay a small wad of paper.
'Kłeczek' here denotes a small tuft or loose piece of wool, emphasizing its texture and small amount.
Ktoś znalazł kłeczek wełny pod fotelem.
Someone found a small tuft of wool under the armchair.
In this context, 'kłeczek' represents a small clump of material, perhaps resembling a natural object, used as a play item in this scenario.