Most definitely. The GUI or graphical user interface that comes with desktop versions of Linux has come a long way and works nicely.
How much does a Arduino board cost?
They can cost anywhere from $9.95 for the Pro Mini or up to $45.95 for the Mega 2560 R3. The basic model to consider when starting out is the Arduino UNO R3 at $24.95.
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Which programming language is good to start with?
Programming or scripting languages today have good tutorials and examples to get started with. C++ and Java are good entry level programming languages. For scripting, Python and Bash work great.
Whats a good all around waterproof shoe?
Salomon puts out a pair called the XA Pro 3D's which are very comfortable. They are extremely waterproof and the quicklace system is great and tucks out of the way. The only downside is the price.