Limit Switches with LED's

[m_c]

The plan above won't work as having just checked the datasheet for the BOB, the limit switch input is gets pulled to ground, so it won't provde enough power to light up anything, and adding LEDs in that way will probably be enough to pull it to ground.

Using some kind of high impedence sensing is the only way to make this work without affecting the BOB input.
For design/build simplicity and to avoid dealing with individual chips, I'd suggest an Arduino UNO. A quick sketch (arduino talk for code/programme) will do what you want easily, the inputs are high impedence by default, and it'll power LEDs easily.