If there is two indentical twin brothers and they both marry two indentical twin sisters will their children look the same?

Genetically, all the children would be brothers and sisters, so chances are good that there would be a resemblance between them.

I am a monozygotic identical twin (mirror image fingerprints, left handed/right handed, share all but 1% DNA) If my brother and I had kids with another pair of twins, the odds of our twins looking the same is quite good; about 75% of our genes are usually from our parents directly, whereas the other 25% can be derived from recessive or dominant genomes. It is always subject to a random chance, but typically, the children would look quite similar most of the time. Keep in mind that most identical twins vary on average by about 10lbs in weight, and 1" in height. Usually, one twin has a greater grip strength also, on average of 15lbs per square inch.