Ask your parents or pastor what your spiritual gifts might be. Ask your pastor or youth minister for service opportunities where you may feel you might have talent. God will use your talent to help your spiritual gifts grow.
Go to nursing homes, children's hospitals, food banks, animal shelters etc. to see if you have the gift of mercy by how you feel or react in these situations.
Get involved in your drama ministry if your church offers this to see how you feel when you do it. Allow your spiritual gifts to grow and mature.
Volunteer to greet at church, read bible verses in Sunday school, help you neighbors by mowing the lawn or shoveling snow, weeding gardens, etc. Pray for your family, your friends, your pets, your teachers, pray for someone who is sick, lay your hands on them (with their permission).
My point is, to test the water...see what happens..see what you feel passionate about!! See what you feel joy about!! What do you feel Jesus is leading you to do?
Ask others around you to give you feedback (what they think) about you and your gifts. Ask other kids to join you! There is no age limit on spiritual gifts! I guarantee you have them! The HOLY SPIRIT provides them. Ask Jesus to help you in your quest to discover them. Like I always say, if you ask him, he will definitely help you! Keep talking to him and asking him for support and direction. He will show you the way and point you in the right direction!
Get out there and find your gift and feel the joy!