i wanna make a "water me man"

i want to make a "water me man" - which is a moisture-dependent LED.

a lit LED means "water me!!!"

the moisture-sensoring can be detected with 2-prods' resistence measurement and:

if Resistance>(preset value) then lit LED.

with the arduino i think it's pretty easy... but what i want to build is a simple enough electronics - that it can be very cheap

chip? naa... it's a very simple circuit.. i saw it on RadioShack's Electronics booklet BenBonfil gave me - it's just that i didn't buy any futurelec goodie-bags yet!!! waiting for the salary i guess..

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