As parents, there are a varieties of ways you can help your entire family during a season of focused prayer and fasting. Here's a few tips and resources:

• Explain what you are doing, why and for how long. Many use mealtimes for this.
• Prepare ahead for any hobby, time or food changes they may not be used to.
• Invite them to pray about giving something up as well.
• If they do, start small and give them grace (and yourself).
• Celebrate what God is doing with your family.

Podcast:

Preparing for Easter - https://www.familylife.com/podcast/familylife-today/preparing-for-easter/

Articles:

http://www.ethoschurch.org/blog/ideas-for-fasting-with-young-children/

https://kidsministry.lifeway.com/2014/01/02/fasting-teaching-kids-spiritual-disciplines/

https://www.familylife.com/articles/topics/holidays/featured-holidays/easter-and-lent/rethinking-lent/

Books: 

Revival Starts Here by Dave Clayton

Hunger For God by John Piper