Both my kids (4.5, 2) love big city vehicle app! For my 4.5 years old who looooove cars it is just like heaven, he love the assignments and and trying to guess which car is about to come. For my 2 years old girl it is more about learning the vehicles names and trying to improve with the assignments by herself. If you have app lovers toddler and you are looking for hours of fun with an added value this one is for you! Enjoy.