A few weeks ago I noticed an interesting flurry of purchases of the School Sparks workbook. And by flurry, I mean sets of 3, 4, 5 and even 10 workbooks being purchased at a time by a single person. Typically when someone orders 2 or 3 workbooks, I just assumed they had multiple children and wanted each child to have his or her own workbook. But a family with 10 kids?