孩子和電腦對手「章魚墨墨」輪流放棋子，先連成一排就贏。三關從 5×5 棋盤連 3 顆、7×7 棋盤連 4 顆，到 9×9 棋盤連 5 顆（五子棋），棋子和正式的五子棋一樣放在線的交叉點上，也可以兩個人在同一台裝置上輪流下。墨墨快連成一排時，要擋的點會發黃光，幫孩子學會「先看對手，再想自己」。
這款放在奇玩星的「動腦休息區」，不是數學遊戲，不算每日任務和課綱進度。家長可以在家長專區設定要不要先完成每日任務才能玩，玩的時間也會算進休息提醒。免費、無廣告、不用註冊，沒有線上對戰或聊天。
陪玩小提醒：下之前先問孩子「墨墨下一步想放哪裡？」輸了也沒關係，墨墨下一盤會讓一點點。
Children take turns with Octo the octopus, and the first to make a line wins. The three levels grow from a 5×5 board with lines of 3, to 7×7 with lines of 4, to 9×9 with lines of 5 (five-in-a-row), and pieces go on the line intersections as in real five-in-a-row. Two players can also take turns on one device. When Octo is about to make a line, the points to block glow yellow, so children learn to watch the other player before planning their own line.
It lives in WonderPlay’s Brain Break corner: it is not a maths game and does not count towards daily missions or curriculum progress. On the parent page you can ask for daily missions to come first, and time spent here counts towards rest breaks. Free, no ads, no sign-up, and no online play or chat.