Chapssalddeok (찹쌀떡) is mainly made of glutinous rice, red beans, and sugar. It reminds me of a snow bowl. It is very similar to Japanese mochi. (maybe even the same)
This is a picture of Chapssalddeok. (About 2000 won – US $2.10 ; You can buy them at the big supermarkets like Homeplus, E-mart, Hanaro mart, etc or rice cake shops in Korea)
I forgot to take a picture of its inside part because I was so busy eating them. 🙂
Its inside looks the same as sweet rice cakes (Gyongdan). This is also a common present for grade 12 students in Korea, because we have the SAT equivalent test in Korea, and Chapssalddeok has a sticky character so people wish them to stick with (get in) some kind of good university by giving the present.