Luke 21:1-4

And he looked up, and saw the rich men casting their gifts into the treasury. And he saw also a certain poor widow casting in thither two mites. And he said, Of a truth I say unto you, that this poor widow hath cast in more than they all: For all these have of their abundance cast in unto the offerings of God: but she of her penury hath cast in all the living that she had.

It is not what we do, but how we do it. Some people give lots of money and others give lots of time. The important thing is not how much, but how important it is to you. Sometimes a little gift is more valuable to God than a large sum.