A number of us from Manchester CoderDojo were fortunate to visit the annual Mozilla Festival held in London in October. One of the sessions introduced AppMaker a free open source tool which allows simple Apps to be developed very simply.
At CoderDojo #18, an enthusiastic audience were able to quickly develop a simple dice rolling app (no excuse now for not playing Monopoly at Christmas!) using a set of simple building blocks. Apart from the enthusiasm of everyone taking part, it was great to see how quickly people were picking up the concepts and looking forward to expand the App by adding new features.
The instructions for developing the App are here.