Many children born these days are indigo and rainbow children who are highly sensitive and spiritual at a very young age. They tend to be old souls and empaths who deeply feel the world around them, making it rather challenging to deal with day to day issues. Thus many authors have developed Oracle, Tarot and Affirmation cards to help children understand and cope with the world - to help them with anxiety and especially their self-esteem.
If your child is interested in these divination tools, it is important for parents/guardians to consider their child's maturity level and see if the cards are age appropriate. They may also want to have a discussion with their child about using such tools and ensure that they are using them in a safe and responsible manner.