For multivitamins and calcium supplements, I just take very regular pills. I take them every morning when I have my oatmeal+milk, and don't think they are hard to swallow. I guess if you take them with water, it is hard. Juice will be better to take them through your throat and esophagus.

If you really dislike them, try Centrum kids. I guess it is similar to what you have had in China. Available at all supermarkets. For calcium, there is a kind of calcium chocolate chews, very rich taste and not too much calories. Actually they can have other flavors, too, like orange, vanilla, etc. You need to take two pieces to be equally effective as a caltrate D pill.

钙片就别喝牛奶一起吃了，身体一次最多才能吸收500mg左右，一杯牛奶已经是300mg了
target有卖chewable supplements果味和巧克力的都有

I also take another calcium pill before going to bed. Better safe than sorry.

钙质不是你吃多少就能吸收多少的.
据说能吸收20%就很不错了.尤其是光吃钙片的话