Contact Dirk, the inventor of ColorFrog

If you like what you see here, just let me know you want one and I can get you into the queue. When your unit is ready to ship, you can pay through PayPal, an EFT or old-fashioned check-in-the-mail. Once shipped, your ColorFrog can be put in front of your students with a 30-day unconditional guaranty. But you're going to love it!