Where can I get a foam core board? And do they come round or do you have to buy them and then cut them to round?

I bought mine at Michaels for 1.00 a board and cut from that with an
x-acto knife.
HtH, Jessica

Any craft store (like Michael's, Hobby Lobby, JoAnn's) It comes in large sheets, like poster board.

I use the 1/2" foam core for my cake bases. I purchase them at Michaels Craft store and use my 40% or 50% coupon. No they don not come round. I use a hot knife (also at Michaels) to cut my foam core boards.

Thanks! I've never used them before so I wasn't exactly sure what I was looking for. That helps a lot!