I don't like some of the common examples of faith that are used to teach children about it. Believing a light will go on when you flip the light switch is not faith, and it shouldn't be taught as such - even to very small children who can't understand the full concept yet.
Paul said that faith is the substance of things "hoped for" and the evidence of things "not seen". There's no faith required to flip a switch and expect the light to go on; it's straightforward knowledge based on previous experience - actually seeing the light go on. Sure, it might not happen - if there's a short in the wiring or the bulb is burned out, but that still doesn't make it faith; it just shows that there can be exceptions to general "knowledge" we have gained through actual sight.
To me, our "faith" is that for which we hope because of the Atonement of Christ and the unseen evidence we see for that hope - a belief, yes, but such a strong belief that it actually compels us to act on our hope. It is Christ-centered, and the examples we use ought to be Christ-centered, as well - like those Paul used in Hebrews 11 after he defined faith.