[a_t48]

My wife has a little thermal camera (Vivitar Instant Camera) that she takes to parties and events. The picture/print quality is a bit better than a gameboy camera, certainly not HD, but also fractions of a cent per picture rather than a dollar like you'd pay for a Polaroid. Fun stuff.

[jopsen]

I bought some for my nephews (age 3-4), it's a lot of fun, because it's instant physical feedback.

Also if you buy a pack of BPA-free paper rolls, you get a crazy amount of pictures for $20. Granted you'll have to re-roll them into smaller rolls to fit the camera.