Running 6 DHT22's for reptile habitat monitoring.

To start, I know nothing about Arduino.

My daughter currently has 3 pet reptile's in 3 tanks. I'm trying to come up with a way to monitor the temp/humidity in 2 places in each habitat. There will be two sensors per tank. I'm using this as a learning experience for her and to hopefully spark future interest.

Can a single arduino collect the data from 6 sensors and output it to either a computer (preferred) or standalone display? What would be the best way to power everything? How hard will the coding be?

Thanks in advance!

665ae:
Can a single arduino collect the data from 6 sensors and output it to either a computer (preferred) or standalone display?

Can do both.

What would be the best way to power everything?

5V power supply (assuming you have a 5V Arduino) connected to the 5V pin, or 7-9V connected to Vin. Chances are you have some spare 5V power supplies, everyone has those nowadays: the chargers of your previous phones.

How hard will the coding be?
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From very easy to very hard depending on your programming experience and what you want to do with it.