A light-up object includes a rubberized outer body； a plug in a cavity of the outer body； and a lighting device located in the plug. The light-up object further includes a first inner capsule piece, the first inner capsule piece located in the plug, and a second inner capsule piece located in the cavity of the outer body, the second inner capsule piece shaped to engage with the first inner capsule piece. The first and second inner capsules are threaded to fit together. The outer body includes grooves, running around multiple circumferences of the outer body. The outer body has a size of approximately a baseball； the outer body is shaped approximately like a sphere； and the grooves are at least 5 mm deep in the outer body.
