A box of blocks. I would recommend being careful allowing kids on a public server, but the game can be played solo, and a smart parent with the resources could set up a controlled server, for the child to play online with friends.
Sweating sickness, also known as English sweating sickness or English sweate (Latin: sudor anglicus), was a mysterious and highly contagious disease that struck England, and later continental Europe, in a series of epidemics beginning in 1485. The last outbreak occurred in 1551, after which the disease apparently vanished.
1 Frey's syndrome is a condition in which sweating occurs from just one side of the face when certain foods are eaten. It occurs after surgery on, or injury near, the saliva-producing glands.  Medications taken for endocrine problems, diabetes, and thyroid disease can also trigger excessive sweating.