God was radically generous with us by providing us with an unchanging, living and active book that is able to equip us for every good work. Your child is stunningly able to retain and enjoy retaining the Scriptures. Your child needs to be equipped, as the below article instructs, for his cancer or yours. Even more your child needs to be amazed by God's wondrous works and promises that belong to her through Christ.
THIS article recommends working diligently with a plan to equip your child. The 'New City Catechism' mentioned at the end of the article is eagerly endorsed by your pastors.
THIS is a great Bible memory set for small children. And don't forget that RSBC Kid's Ministry also utilizes a family wide Scripture memory system that is distributed each month.