Outdoors

Beach Tic-Tac-Toe in a Scallop-Shell Box — Sea-Creature Peg Game (starfish vs shells)

A pocket 3x3 peg tic-tac-toe for the beach that lives inside an openable scallop-shell clamshell box. The lid is the play board (pieces plug into its 9 holes, friction fit, so wind can't blow them off); the base is a plain storage cup, so the loose pieces can't spill. 5 starfish vs 5 scallop shells (equal counts, so whoever starts both players have a full set). Fully parametric OpenSCAD; every part prints flat with no supports.