However, age is just a number to God. Sure it helps categorize us into groups of our peer, but our age should not control our ability to serve the Lord and live your life for Him.
I remember thinking that I was too young to make a difference. Sometimes I still feel that way. However, God can use everyone at any age to make a difference in His Kingdom.
Timothy was a young leader and feared that the people would not hear his message because of his age. Paul, his mentor, encourage him to not worry about his age and focus only on his witness. By living your life for Christ, your love, faith and diligence will provide the way for your message and your efforts to be noticed.
Nothing for God's Kingdom is worthless. You are never too young or old to live for Christ and make a difference in the lives of others.