These are cards to show table numbers. However, you can also use them for whatever your heart desires. :) I use them quite often just to split the class into groups. Put the cards wherever you wish and have that group meet by their corresponding number. There are cards for 1 - 9.
There are also cards to write students names on, so you can remember which students are in which groups.
Your feedback matters! Please let me know how these worked for you!