This is the 17048th most frequent Russian word.
спичками
"Спичками" means "matches" (instrument for igniting fire) in the instrumental plural form in Russian.
Here, 'спичками' is used to indicate an instrument or objects being actively engaged with or manipulated in an action.
Дети играли с спичками возле костра.
The children were playing with matches near the campfire.
In this sentence, 'спичками' illustrates the means by which the action (lighting the fire) was performed.
Он разжёг огонь спичками.
He lit the fire with matches.
Here 'спичками' is employed to signify the tool or object that is the subject of the discussion or choice.