Serve God today by leading your child to Him. Take the time today to open your Bible in front of them. Pick a verse and discuss it with them. Let them know how important God is in your life, how He has helped you, supported you, saved you. Remind them He is always in the room with them, and He is just awaiting the invitation to be with them. Encourage them to invite God into their daily life with daily prayer and conversations with Him. The more you make God a daily part of your life routine, the more sure you can be that when your child struggles in the future their natural choice will be to seek God in those moments rather than a different source of solution/relief. Serve Him by leading them, so they will know exactly who to turn to when they need someone.