Children with autism, ADHD, and specific learning difficulties often have memory problems which can be worked on with good educational products. If you find an activity that the child enjoys, introduce the activity by using a portion of the activities within the game or task. With confidence growing, introduce more part to the game or task until the child can cope with the whole activity being used. It is important to take your time with new activities, expecially if it entails introducing new vocabulary and concepts.