Science Buddies: "Ask an Expert"

Hi, I'm thinking of doing the project linked above, but I am wondering about the type of magnets it calls for: "5–10 permanent iron magnets of equal size and strength." I visited a hobby store today and asked about "permanent iron magnets," and the clerk wasn't sure what I was referring to. They carried ceramic magnets or very small rare earth magnets. Searching online, I can't find anything to purchase that is specifically called a "permanent iron magnet." My question is, would it be alright to use ceramic magnets for this experiment, or what would you recommend?

Thanks in advance for your help!

Hello,
Can you please post the link again, it's not showing up, thanks!
-Regina