When the August sun is beating down, a little girl

or her mom can trust her handy sunbonnet,

stitched in calico, gingham, eyelet and denim

by Betty Bowers Abbott. Abbott, 64, who calls

herself The Country Mouse, says she wore sunbonnets as a child "and I do now--they're great for gardening." She adds, "I like very much to make pretty things for nice people. I always use good quality (materials); I never use junk. I feel if you put your work into it, it should be good." She also makes party aprons, both ruffled and patchwork ($18.50); toddlers' rompers (sizes 1-4) to match the sunbonnets ($7.95); quilted reversible vests with fitted waists and pockets ($18.50), and bishop's miter tea cozies. Her head covers come in three sizes for toddlers and girls and in "grown-up sizes" too. All are machine-washable and machine-dryable, and they unbutton flat for washing or packing. A child's bonnet in calico and gingham is $4.50 and in eyelet, $5.50. Grown- up bonnets--great for those who like to square dance, as well as to garden--are $7.50 in calico and gingham and $8.50 in eyelet. A plus in this age of specialization: Abbott says she'll do custom orders, and she won't charge extra.

Sunbonnets. $4.50 to $8.50. Berry Hollow, 943 Bonifant St., Silver Spring. 588-5387. Open noon to 5 p.m. Monday through Saturday. The Country Mouse (Betty Bowers Abbott). 8308 Flower Ave. 401, Takoma Park. 589-9367.