Everyday Pasta by Giada De Laurentiis: This cookbook is full of simple, delicious Italian recipes. I love the chapter on easy weeknight pastas, but even the pasta recipes for special occasions aren't too challenging. There are also plenty of kid-friendly dishes. Some of my favorites are the Fried Ravioli, Italian Chicken Salad and Rigatoni with Sausage, Pepper, and Onions.
Everyday Food: Great Food Fast from Martha Stewart Living: This is one of my all-time favorite cookbooks. Every recipe is simple, and as the name suggests, fast. There aren't plenty of recipes with 5 ingredients or less. Even if I haven't planned ahead, I know I can turn to this cookbook and find something I can put together with the ingredients I have on hand.
The America's Test Kitchen Family Cookbook: Because the recipes have been so vigourously tested, it's hard to go wrong with this cookbook. I love that there are several variations for many of the recipes. For example, the cobbler recipe offers variations for all different kinds of fruits.