These are the kinds of things you may be good at:
Hug a kid, make them feel special and noticed.
Wipe a tear.
Kick a ball.
Lead a small group discussion.
Help set up and serve snack and lunch.
Set up craft.
Help with craft.
Lead a game.
Invite a friend to volunteer with you.
Do you know someone who is good at speaking to kids? Invite them to come share. (Examples: Firefighter, military, paramedic, doctor, magicial, puppets, etc...)