hi im looking for an expansion board which will give me more than the original 13 pins i have on my Uno, anyone suggest one?
If you just need up to 6 more outputs, and have free analog input pins, you could use A0-A5 as outputs. Note, on boards with more than 6 analog input pins, I think you can't use the higher pins for outputs, but I'm not sure.
Rather than getting an expansion shield, you could upgrade your UNO to a Mega where you have 54 output pins (15 of which can be PWM), and 16 analog input pins.
For simple output, I did see this shield in searching the web: http://nootropicdesign.com/ez-expander/
Another way to expand is to switch to using SPI or I2C which are serial buses for hooking up more pins.