An 11 year old girl made a neder that if she finds a certain object that she had lost then she'll give to tzedeka 20 agarot (which is today around 5 cents) every week (for the rest of her life.)
Does the neder take affect? Could her Father be "mafir" her neder?
(As a side note I had a doubt also over here if a neder can take affect on something less than a prutah however it seems to be that 5 cents is more than a prutah so that woudln't be part of the question -- a prutah is around 2 cents. I'm mentioning this just in case someone might point out this fact and that I don't think it applies over here.)