Process documentation-AT APP design

My assumptions : I think and look at things from a child's perspective, then list the solutions.

Research : I search for the advantages and disadvantages of apps on the market and learn from them.

Sketch options : Sketch and evaluate in order to improve and determine the final plan.

Best solution : Select the best plan and analyse. After collecting the comments of my classmates and my personal ideas, I make the final model.

My goal : Use simple and lovely images and simple words to convey information, make app convenient for children to use, and improve the security of top up function.