Alphabet Writing Application in Android

We are looking for an Android expert who can develop us an application that can trace an Alphabet letter. It's for an educational purpose and it needs a kid to learn how to write an alphabet or a number etc. The developer must provide us with the source code. We don't need the graphics or anything but the tracing must be done in a professional manner. Please apply only if you understand our requirement. Budget will be negotiable, happy to discuss. Asif