An universal cercuit board

This is no special project. Its a small board for beginners contending of five leds, two potis, three buttons, a speaker and a photocell (Arduino pins A3 - A5, 0 and 1, 11 to 13 are not used, can be connected to external components). I think you can realize many different small projects with this board. So I`ll perhaps load the one or the other sketch from Arduino up. If there are some errors in the circuits or somewhere else, please tell me so that I have the chance to improve it quickly.