You don't and shouldn't need to have a 4-year engineering degree to build a modern invention that is commercially viable. Fab Labs around the world, including Kenya, rural India, inner-city Boston, provides people affordable means to invention.
Fab Lab (short for Fabrications Lab - but what a fabulous name, eh?) has a mission to offer affordable short-term training modules that introduce people to the tools and knowledge that they need to design and create products. Fab Lab also links inventors to investors and mentors who can help them with creating the business plan for their prototypes.
Looking at blogs such as
which showcases Kenyan local ingenuity, it's clear that people everywhere have the creativity and insight to create solutions that address their needs, but what they need is help in making their inventions commercially viable.
I believe that a key component of economic development is creating an infrastructure that breaks down the barriers to access to financial capital and knowledge/tools for people.