In the past few months, we have covered a bunch of interesting apps that let you build your own machines and even creatures. Evolution is another one that allows you to use joints, bones, and muscles to build your own creatures. It relies a neural network and genetic algorithm to allow your creatures to learn and improve.
You don’t win anything for building the ultimate creature, but playing with Evolution is a pretty decent way to kill time. You can try this app for free.[where to get it]