

Grand Grandparents' Day was an annual event that aired on Sprout during Grandparents Day which featured episodes of Caillou and later Zou with a bottom-of-the-screen scroll of viewers' messages for their grandparents. The marathon aired from 2008 to 2014. In its first year, the marathon aired from 11AM to 3PM ET. In its last year, the Zou marathon aired from 9AM to noon ET (the timeslot usually occupied by The Sunny Side Up Show) and Caillou aired from noon to 4PM ET.
Logline
- "We're celebrating Grandparents Day on Sunday, September 7 with special episodes of Caillou from 11am-3pm ET. Send in a special message for your grandparents and it could be on TV during our Caillou's Grand Grandparents Day celebration!" (link)