DOT-O

From the box: It's easy to get started: Just play a Number 1. Then build a pile from Number 1 to Number 5. BUT BE CAREFUL! An opponent may get you with a DOWN-A-DOT-O card, which will send your pile a tumbling!... Until you counter with a ZAP-A DOWN-A-DOT-O! Then play it safe with ADD-A-DOT-O NO DOUBT-O, and maybe you will win!