He asks to watch volcano videos on youtube everyday and has sat through 45 minute national geographic documentaries including one one the Icelandic volcano last year and another about a theoretical "super volcano" lying dormant underneath yellowstone. He calls these documentaries "serious".
Anyway, as luck would have it, Aunt Rachel, for christmas sent Matthew a little make your own eruption kit which is basically a plastic spout you attach to a bottle of diet coke - you then drop Mentos candies into the coke creating a giant eruption. Here is a video.
