Expand the selection to include more complimentary items like barrettes, headbands, underwear, socks.

What about a hot plate with some fresh cooked pupusas or something? It could be something simple, but something people want, but would be a general audience item that anyone can buy and eat. The items you have now have a smaller addressable market. Food has a higher sales rate since anyone may want your food. Also once they eat it it's gone, the next day they need to buy more so you'll have more repeat customers more often, especially if you are cooking delicious food