Riddle of the Day

[Gizmokid2005]

I have hands that wave at you,
Though I never say goodbye.
It's cool for you to be with me,
Especially when I say, "HI."
What am I?

ANSWER (Congrats acoustikarl and cauzomb): A fan.

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NEXT RIDDLE:

When I am filled,
I can point the way;
When I am empty,
Nothing moves me.
I have two skins,
One without and one within.
What am I?