WOW!!!! A 13-year-old boy in Utah has just spent his ENTIRE SUMMER building a custom wheelchair for a 21-month-old baby girl he's never met. His name is Zac Waters. He watched a YouTube channel about 3D printing and decided he wanted to do something with it. So he found MakeGood, a nonprofit that 3D prints assistive devices for people with disabilities, and got to work. He spent over 300 HOURS, designing, printing, testing. and assembling. ...but he didn't just build a chair, he custom-designed it specifically for her He custom printed pink accents, because pink is her favorite color. He built her a removable cupholder and tray table. He designed a space in the back for heavier medical equipment. He gave her soft, bendable straps so they don't dig into her, he even designed an adjustable footrest and headrest so it grows with her as she does. When they asked him why he did it, he said it combines his two favorite things in life: 3D printing and helping people in need. He's THIRTEEN YEARS OLD.