With Baby eva heart beats you can finally play with an interactive doll that responds to your cuddles with sound effects. But the peculiarity is the heartbeat that increases or decreases based on how much you play with her, if she's excited and happy the heartbeat increases and the light is very strong, on the contrary when it's less strong it means she's relaxed and can even fall asleep. Tickle her that she likes so much and play with the teddy bear that is included in the package. The game is recommended for girls aged 3 and up.