Shuffle the cards and place them randomly face down on the table. The youngest player turns over two cards. If these form a couple, the player keeps the cards and keeps on playing, otherwise he/she turns them back over and it is the following player's turn. The game ends when there are no more cards on the table. The player with the most cards at the end wins.
Invention timeline: Shuffle the cards and place them randomly face down on the table. The youngest player turns over two cards. If these form a couple, the player keeps the cards and keeps on playing, otherwise he/she turns them back over and it is the following player's turn. The game ends when there are no more cards on the table. The player with the most cards at the end wins.
The chronological timeline chart contains the names of the inventions from the oldest to the most recent. The matched pairs can be placed in chronological sequence, from the oldest to the most recent one, forming a time line of the inventions and their inventors.