Arduino starter kit for those who already have an arduino board

So I have two Arduino Mega clones that I bought to mess around with and found they work fine. My son wants to get into it so I am giving him one but would like to give him a pile o' parts to get started with right away. I know 'starter kits' are a ripoff pricewise but they are convenient. However, all the ones I found so far come with an Arduino. Are there any kids that don't come with a board? I'm not too picky about contents, just some sensors and LEDs and stuff to get started with. I actually have some serial LCDs from another project and I picked up an ethernet shield so I do have a couple of things he could start with, but looking to round it out a little.

thanks

Not from Adafruit or Spoarkfun, but eBay has a sele tion
http://www.ebay.com/itm/SunFounder-New-Project-1602-LCD-Starter-Kit-For-Arduino