He played Minecraft and worked with Saxon Math 2.
Robin observed healthcare infrastructure and and practices when we took his 4 year old sister to the emergency room to have her toe x-rayed (luckily, it was not broken.) While there he was able to sign a girder which will be used in a new hospital building.
We made dry ice ice-cream as described in this video: http://www.youtube.com/watch?v=epsr4c_oZoM. Robin mixed it with root beer for further carbonation.
We discussed the holiday of Samhain and the roots of Halloween, and told stories about our ancestors. Robin dressed up as a Ninja and went trick or treating, and created a pumpkin:
Robin went to a birthday party at a gymnastics studio and was able to try out a bunch of the equipment.
Robin attended his Religious Education classes.
And we read lots of books:
Molly, by Golly!: The Legend of Molly Williams, America's First Female Firefighter by Dianne Ochiltree