Have you heard the saying: “ If you can ’ t find it, build it ” ? Well, that ’ s what Maddie Bradshaw did. The 17-yer-old girl is from Texas, USA. When Maddie couldn ’ t find fun magnets for her school locker, she decided to make one by herself. Her uncle gave her a bag of bottle caps( 瓶盖 ), and Maddie started to work. She made a bottle cap more beautiful with a picture of Albert Einstein and then put it on her locker. Her friends loved it and asked her to make more for them. Later she took 50 to a local store. To her surprise, it sold all of them in less than two hours. Maddie then had the idea to make the bottle caps into fun necklaces. In 2010, she even decided to use 300 dollars of her own money to start a company. She named it M3 Girl Designs. Now it sells about 50000 bottle cap necklaces each month. They can be found at different stores across the US, Canada and the UK. Maddie has written a book about her experience. It is called You Can Start a Business, Too! “ I want other kids to know that they can make their great ideas come to life, ” she says.