The Baby Tweets app has more than 70 word exercises to develop the child's vocabulary. The toddler, from about one to two years, is encouraged to identify objects in a picture, showing a number of objects familiar to him. When he touches the correct picture he receives positive reinforcement. In the event he chooses incorrectly he will hear the correct name of the object sought and in this way will enlarge his vocabulary.
For children with multiple language speaking parents, it is a great tool to cross exercise words, due to that you can easily switch from one language to another.