Hsctek Light up Stick Figure Costume for Kids

Could you cut out the lights and glue them to different clothes?

Can you wash and dry this costume?

The sizing chart says 7-9 & 10-12, but then when I go to order a size, the choices are either 8-10 or 12-14. My daughter is 57 in. What's the best sz?

it is suppose to making a beeping sound when it flashes and a constant beep when it's on, it's very extreme?