Whenever little Sam goes out ``voling,'' his big brothers come too; whatever he brings home to Mother--nuts, daisies-- Arthur and Henry bring more of it. Sam likes them, but wants to do something by himself. Setting out early one morning, he has a splendid time at first, but as he ventures into wilder territory, he likes it less and less--and just then Arthur and Henry turn up, to a hearty welcome. Firth's freely drawn soft-pencil sketches, enlivened with watercolor in soft tones, present a vole's-eye view of lush meadow and woodland, including charmingly cozy details and a deft characterization of the winsome explorer. The well-honed, repetitive text would also make an amusing easy reader. (Picture book. 3-7)