His Rainbow Loom YouTube channel has more than 66 videos and close to 4 million views. There are thousands of homemade videos from kids across the world on YouTube, too.

Toni Notarangeli thought she’d misheard when her 8-year-old son Angelo begged her for a toy he just had to have: a plastic loom that helps kids weave colorful rubber band bracelets. Angelo li… ...