A lot of $$$$
My daughters loved this game but dont play it often anymore because they get frustrated because they cant feed the pets often unless they use hearts which your limited to how many you can collect in a day and or bling which for anyone is extremely hard to get especially for small children or it costs way too much and isnt realistic. There are probably more than half the houses, pets etc can on,y be bought with bling and are on average $20 or more I could go buy actual toys for that money.... If your expecting people to spend that kind of money than you cant limit the amount they play with it, feed it etc. the bling is also very easily miss spent when you have little people because as soon as you have any and you tap certain things eg. Quests it can use it. Overall great potential just the cost of the game in the long run is just not realistic for the majority of people which to a young child is hard to understand and therefore leads to frustration!!!!
Fiddles buddy about
Littlest Pet Shop, v2.3.0