Cut cardboard into curved shapes and roll them into cone layers, gluing edges securely and letting them set.
Paint each cone dark blue and add white dots, lines, or constellations once dry.
Cut and paint planet shapes separately, adding faces, rings, and texture details.
Stack the cones from largest to smallest, gluing them together carefully to form a stable tower.
Stack the cones from largest to smallest, gluing them together carefully to form a stable tower.
Finally, add finishing details like pipe-cleaner rings, a paper rocket, and a smiling Sun at the top.