it would have to be able to run a code scanning app, so I'd suggest Android devices because they are lower cost than Apple and one of the only reliable OS with enough apps

Tammy- are you wanting the QR code to link to a web-based source is simply display text?

talljim - Most likely a web-based source, so would need to be a web-capable device with a QR scanning app.

7" Galaxy Tab 2 ($200)

iPodTouch (but what generation????)

talljim Thank for the croak.it app, by the way. I shared it today with primary teachers in Chicago.

shirky17 Thanks for those options.

I'm thinking a used iPhone might be a good option as well. Wouldn't need the phone service and would work as an iPod touch.

i wish i could get people to donate used/old iPhones with no service so I could do that also