The video clips that allhailhata has posted are awesome! ...except that the narration sounds a bit weird (I guess he's a Japanese native?)
I just bought some fresh strawberries today, may be I should try making some ichigo daifuku for myself?
I don't know if OP lives in a big city. Hopefully there is a Asian grocery store in her place (there're a few in Vancouver). I have a Japanese wagashii cookbook which also has a few 浮島 recipes ("floating island" = Japanese steamed cake?), if OP is interested in it, I will scan the pictures and translate the recipe into English in a few days.
Here is a picture of 浮島 that I saw from web.