At the moment there still is no overwhelming evidence of the theory of evolution.
With respect, the basic building blocks of the theory, like genetic drift and speciation are very easy to illustrate.
If you can accept that the cheetah (Acinonyx jubatus) is not fertile with any other member of family Felidae, than you have accepted the concept of genetic drift. Species drift apart over time until full reproductive isolation eventually occurs.
If you can accept that the golden barrel cactus (Echinocactus grusonii) sprang from a chance hybridization in Central Mexico, than you have accepted the concept of speciation. In plants, hybridization can and does produce new species that are reproductively isolated from the parent species.
The origin(s) of life itself is not evolution. As Cofty pointed out, it is a related subject, called abiogenesis.