iphone/ipad education application

Apps can run in both iphone and ipad Parent ask question by choosing some pre-set wordings in the screen (e.g. "how" "old" "are" "you") and their children answer questions by also choosing some pre-set wordings in the screen (e.g. "i" "am" "4" "years" "old"). There is no need to show the keyboard in the whole apps. All questions and answers are set by choosing pre-set wordings. For ipad, question and answer can be shown in the same screen. For iphone, as screen is small, after question is shown, the apps need to allow user to switch to answer page to select answer. The questions and answers are divided into categories and parent can choose one category (e.g. animal) and ask questions. Please send the links of previously similar working apps for reference. Source-code is required. I only choose vendor with frequent communication. Thanks.