You're absolutely sure you sent her out with two gloves, but by the time she's come back inside from playing, one's missing. Gloves just don't want to stay on a tyke's hands -- or maybe she's helping those gloves along some when they get in her way. Regardless of how the gloves make their way into oblivion, rectify the problem to ensure they stay put from now on.
Get your child to stand with his arms spread right out. Measure from the right wrist to the left wrist and add about 6 inches. Cut a piece of string or a thin strip of fleece fabric to this length. Sew one end to the inside edge of one glove and sew the other end to the inside edge of the other glove. Slide the gloves through the arms of his coat and now they'll dangle in place with little wiggle room to fall off your youngster's hands.
Cut eight little pieces of hook and loop fastener -- four hook fasteners and four loop fasteners. Each piece should be about 1-inch square. Sew two loop fasteners to the inside edge of each sleeve of her jacket. Sew two hook fasteners to the outside edge of each glove. Now, when you slide on her gloves, press the fasteners together to keep them from falling off her hands.
Measure the circumference of your little guy's wrists and then subtract about half to a full inch. Cut two pieces of 1/2-inch-wide elastic, each to the above measurement. Flip the gloves inside out and sew the elastic around the wrists of the gloves. Pull on the elastic as you sew to make it stretch all the way around. If the gloves were too loose before, now they'll stay snugly on his hands without being too tight and cutting off circulation.
Pin one edge of the glove to the inside edge of her coat or jacket to keep it in place. Turn the jacket inside out and sew this little pinned area of the glove to the jacket. She'll still be able to get the gloves on and off because it's just a little area sewn together, but the gloves won't be able to fall off and get lost.