This is a short chapter book about 2 girls who find a magic glove in a box of old things. It allows them to draw like an artist and play the piano beautifully.
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1This is very brief is there anything else about it that you remember that you could edit in? For example, when did you read this? – TheLethalCarrot Aug 29 at 18:31
What the Witch Left (1973) by Ruth Chew
There's a summary on a (fan?) website devoted to her. Here's a relevant bit from the summary:
Katy and Louise find some things locked in a dresser: a bathrobe, gloves, boots, a mirror, and a metal box. The gloves seem to make Katy play the piano, do homework, sew, and draw much better than usual.