Pour the black filler evenly into the tray, smoothing the surface with your hand.
Use glue to draw circular orbit lines directly on top of the filler, working from the center outward.
Place the Sun in the center, then position planet cutouts along each orbit.
Scatter small pebbles and star confetti to suggest asteroids and background stars.
Let children move planets freely, trace orbits, and talk through colors, names, or positions at their own pace.