can find lots of LED with resistor kits on ebay. Here is one for 50 LEDs with resistors for $4
About a month ago I found a 100 LED w/resistor set for about $5 and just a resistor set for $15. It included 2500 resistors everything from about 12ohm to 1m and everything in between. 50 of each value. Good way to get started for small stuff.