Tablecloths on tables are downright dangerous with little kids around. I don't need tablecloths, but I do need cute Christmas skirts for my girls!
I made these skirts using the simplest kind of skirt pattern there is, the gathered skirt.
There is a full tutorial and more details here.
Note: You don't need to have twins to dress your kids up in identical clothes. I do it all the time and my girls are over 2 years apart and look NOTHING like each other :)