DD (6) is HE and has been v interested in Ancient Egypt of late.
So we set about mummifying Barbie - anointing, salting, removing plasticine innards and interring in canopic jars, making a sarcophagus, the lot.
So DD learns plenty, and we rid the house of one piece of over-engineered unrealistically shaped bit of plastic tat.
Next, sky burials, and then maybe pushing Barbie out to sea on a burning boat.... further suggestions welcome!