We used the large green toobeez attached with balls to make a tic tac toe board. then to play the game, use the balls as O’s and 2 small green toobeez laid on top of each other to make X’s.
Some additional ideas to make this work for a large group of kids would be to put them on teams. Designate what team they are on( by a colored sticker on them maybe) and have the kids stand in the Tic Tac Toe squares instead of using X’s and O’s
Also, you could use this as a review game for school subjects. (spelling for example) They spell the word, if they get it right they get to place a piece (or have a team member go to a spot on the board) If it’s spelled wrong, the other team gets to put a piece on (or go to a spot)