Yes ! (only the Solder Package comes with an unsoldered version of the unicorn.)
All other Perks comes with a soldered version ! Earlybird Basic Soldered, Basic Coding Unicorn Shield for Pi, Basic Coding Unicorn Shield for Arduin, Learn to code packages and Plus Packages are all soldered ! So you can start right away.
Only with many wires. The Arduino version and the Pi version are designed so that they can be attached directly to the IO-Pins (Arduino) or GPIO-Pins (Raspberry Pi). However you can connect the Arduino Version to a Raspberry Pi and vise versa, but it will take many wires.
There are 2. 5mm (white) LED for the eyes and 9. RGB WS2812 LEDs on the shield.
All LEDs can be turned on and off separately. The RGB LEDs can be adjusted in color and brightness. The eyes can be turned on and off.