My granddaughter (8) saw this on youtube and wanted it for Christmas.  She put it together (with a little help) and was very interested in how everything 'fit'.  I was a little disappointed that she seemed so taken with the squishy organs that she didn't focus on what they do.  I do think that she will come back to this often and begin to really develop an understanding of body systems.  I plan to use it for teaching as conditions/illnesses present themselves I media or individuals she knows.