My 5 year old LOVES this app! We explore all parts of different systems throughout the human body. She has speech & cognitive delays but this app has managed to assist in growing her vocabulary. Now she knows ALOT of body parts, the purpose they serve our bodies, and how their mechanics as well! Shes surprised MANY by sharing words and information she learnt from this app! I wouldnt change a thing. NEVER crashes for us, provide our software is up to date. Worth every penny. We own over 600 Apps (& kids apps). THIS IS THEE BEST BLDY PART LEARNING APP for kids I have found in 4 years! ALSO, visit their other apps, just as informative and engaging!