Rosetta Code (http://rosettacode.org/wiki/Rosetta_Code) can give some nice ideas for first experiments and tasks to conquer before moving on to a bigger project.
Like the famous cellular automata that many students have to write at some point of learning to code ^^ https://rosettacode.org/wiki/One-dimensional_cellular_automata
Follow
There's a list of unimplemented Tasks for Python: http://rosettacode.org/wiki/Reports:Tasks_not_implemented_in_Python
Everyone could pick something they like. And contribute to the wiki ^^
