I have owned a number of digital cameras over the years and this little guy is still one of my favorites.  The picture quality isn't good indoors and the resolution is only 1.3 mega pixels but it is cool.  It is light and easily slips into a pocket.  (It's about the size of a credit card.)  I have had more people comment on this device than almost anything else I own.  (It is worth the $$ just for the 'James Bond' factor.) 

This camera will hold up to 52 pictures and the internal rechargeable battery lasts forever.  (To transfer the pictures and charge the battery, just connect the USB cable to your computer.  Extremely simple!

ASIN: B000066SAM

$75

People ask me all the time, "What is the best camera to buy for the classroom?"  The answer is simple... the basic Mavica.  The Mavica uses floppy disks for picture storage.  Students can easily take a picture, pop out the disk, put it in a computer, and start working with the image.  Another student can use the camera right away.  

ASIN: B000063S40

$300

People ask me all the time, "What is the best camera to buy for the classroom?"  The answer is simple... the basic Mavica.  The Mavica uses floppy disks for picture storage.  Students can easily take a picture, pop out the disk, put it in a computer, and start working with the image.  Another student can use the camera right away.  

ASIN: B00008O35Z

$400

www.olympus.com

Stores images on XD memory card.  Small, light, and takes fabulous pictures.

256MB memory card holds 300+ pictures
ASIN: B000087KY8

$180