On our last long car ride we made up a game that is great for car rides but we are now realizing it is great fun when stuck at home too! We call it the Book Game.
One person thinks of a book and gives an initial clue such as "the girl in this book likes to make things" and then the others playing try and guess the book. More clues are given such as "there is a dog in this book", until someone guesses the book. It's that simple!
Both my 4 and 6 year old love the game. It can however be surprisingly difficult to think of a book initially. The fun part of playing the game at home is that you can take "book breaks" which is when everyone has 3 minutes to run and look at books around the house to get new ideas.
I hope you have as much fun with this as we do!