The cleaning product, Formula 409 didn't get its name from the area code where it was developed. And it's not the birth date of the creator's daughter. Formula 409 got its name from perseverance. The two persistent scientists didn't get the formula right on the 101^st, or even the 401^st try. Only when they created the 409th formula were they satisfied that they'd created the ultimate cleaner. Perseverance pays off in life. Haven't found the right ingredients for a joyful marriage? Persevere. Does your child want to quit the team? Persevere. Is your job—or lack of one—bringing you down? Persevere. Don't give up or give in. Perseverance learned early will benefit your child for a lifetime, so here are 10 Things to Consider Before Letting Your Children Quit.