Alright, In a compeletly 100% religious home (Top level Chabbad "to the max"):
Upon entering a Jewish home, you will find many bookshelves with all kinds of books written in Hebrew, and some in English. These books contain all kinds of comentary from the Rabbis hundres of years ago, on the original holy texts.
When entering the kitchen, you will find certain utensils seperated from the others. This is because Jews are not allowed to mix dairy and meat utensils, or, more stricktly, food. This is also part of keeping kosher. In the kitchen, you will not find any food that contains meat of an non-kosher animal. (A non kosher animal, or rather a kosher animal, must have split feet/hooves, and must chew it's cud (like cows).
In a Jewish home, such as the one described in the first sentence, there would be a special time during the day in which the father would learn from the Torah (or the 5 books of Moses), or learn the commentary of the Rabbis from various types of books (including the Gemara/Talmud and the Mishnayis).
If you enter a Jewish home on Saturday, you are definatly NOT going to find ANY electricity being used in the whole house. You will also probably not find any work being done. This is because it is the Sabbath/Shabbat day, where G-d took a "rest" from creating the world. During the times of the holy temple, the Jews would have 30 types of work, which they were not allowed to do on the Sabbath/Shabbat. This included lighting a fire, so later on, there were new laws concerning some of the things that we do today that include lighting a fire, such as turning on a light-there are sparks in the wires etc.
When entering a Jewish home, you might also notice the family's clothes. All the boys in the house would be wearing what seems to be, "wedding" clothes, or nice clothing of some type. (Father would be wearing a black suite with a black hat and black pants and a white shirt, and children just plain white shirt and black pants.) Another important detail about their clothing would be that they would all be wearing their Tzitzis (the white strings hanging from under their shirts).
This is just about all I got-I skipped a lot of details, because I didn't think that it mattered-but if you want them, just contact me and I'll be glad to respond!