What kind of instrument is this?

[.:FancyPants:.]

Shining Star:
http://www.youtube.com/watch?v=vwc0AW67CmA,
from 0:48, becomes the lead at 0:56, and turns into guitar at 1:01.

then

Extreme Ways:
http://www.youtube.com/watch?v=pOuPqeHXMzQ
starts at 0:07, plays through pretty much the whole song.

i really love this instrument, which i assume is played through a keyboard, and would love to know if it has a name.

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[Tammy]

Clavinet / Keyboard programmed to sound like one

[fred da kiko]

Electric trylophone.

[Tetris]

Electronic keyboard / Synthesizer