Adding trim to an existing lampshade is just the sort of thing my 10-year-old daughter would love to do. Purchase a yard or so of rickrack and pom-pom trim and get out the glue.
Bring spring indoors with a lovely branch and bird centerpiece. Let your children choose brightly colored birds from a crafts store, and you can help wire the birds onto branches you find together outdoors.
Some of my happiest childhood memories were afternoons sewing with my mother. If you've been thinking you'd like to teach your children to sew, this simple pillow cover is a great project to start with. You can begin by picking out fabric together and end with a useful object you both created.
If you have a child who's interested in building and you have some basic tools, you might consider building a bench like this one Erin Lang Norris made from reclaimed wood.
If you have earrings scattered over your bathroom countertops, creating an earring display like the one shown here may just get things in order. Grab your daughter, an old frame and some lace. Simply remove the glass from the frame, add the lace and have fun arranging your earrings together.
If your children need a place to showcase their keepsakes, make a bulletin board together. The one shown here was created with foam-core board and an old potato sack.