I feel like you guys aren’t really “explaining like I’m 5”. Let me show you:
Sometimes, when a mommyboard and a daddy graphics card fall in love, the daddy graphics card puts his connector pins inside the mommyboard’s expansion slot. Then when they both get turned on, millions of tiny electrons surge out of his connector pins and into her expansion slot, where they travel up through mommyboard’s data bus, and into one of her memory cards. Meanwhile, there are thousands of image files inside mommy’s storage drives waiting to come to life, and every once in a while one of them ventures out of the storage drive and into her memory card. And if the electrons and the image file happen to meet at the same time, then 9 milliseconds later, a picture of a baby appears on the monitor!