Arduino Project research

So I am going to be commencing a project using Arduino and after a little research it seems there are some wicked cool things out there to play with, such as an Etch-A-Sketch Clock, a musical laser harp, and a Botanicalls kit that you built and place in your plants which then tweets conditions of the soil to aid in perfecting the soil. Some more research has to be done but further updates containing any progress will be added at a later date. :)

http://www.sparkfun.com/products/10334

Kits available from above website but at the mo I am looking for something a bit more money-less friendly.

http://hacknmod.com/hack/create-techno-with-a-laser-harp/

Laser harp!