Measurement -- Longer/Shorter. Easy for my five year old but good practice for her to work independently. Was surprised my two year old sorted and match the lines on her own the way they are in the picture. Super easy to put together.
10 apps for kids to learn about human body -- apps are perfect learning tools to learn human anatomy and functions. With 3D interactive multi-media features, it is fun to see the inside of your body and play with the interactive visuals and videos. Kids will have so much fun, since remembering bones and muscles is not boring anymore!