In a delightfully comic story with words and pictures full of character, slapstick, and funny reversals, two children nag their crotchety grandmother to make blackberry jam. They go blackberry picking (she picks and they play); they mash and smash the berries, squirting little blops of juice all over the kitchen; the juice finally cooks up, and Grandma confidently fills the clean jars with frothy liquid; then there's the cleanup ("walls, floors, spoons, pans, Grandma's cheeks, and kid's hands--all purple"). That night the jars of jam are cool, and they prepare their toast--but the jam's a disaster, all soupy and drippy. Grandma, who knew she should never have made jam, sags at the table, exhausted, until the kids find a delicious use for the messy liquid. McGregor's cartoon-style illustrations in pen and watercolor dance across the pages, as messy and warm as the story, and all the generations will appreciate the reversal of the stereotype of competent, wise, domestic granny in touch with the old cottage crafts.