This is a fun little puzzle that you can easily make.
Cut out 9 small squares of paper and write the numbers 1 through 9 on them, or use the Ace through 9 from a deck of cards, and line them up in a row from 1 to 9.
(For taking a picture, it worked out better to group them into 3 rows, but you'll probably prefer to have the numbers all on one row.)
Roll two dice. The picture shows a 3 and a 6.
The idea is to remove some numbers which add up exactly to your dice roll. In this case, we could remove the 9, or the 6 and 3, or the 5 and 3 and 1, etc.
In this example we "sliced away" the 6 and 3, then we rolled a 2 and a 4.
Now we can slice away either the 4 and 2 or the 5 and 1.
Notice that we can't slice away the 6 because it has already been removed.
Continue "slicing and dicing."
If you are able to remove all of the numbers then you win!
However, you will usually end up with a dice roll which won't allow you to remove any more numbers, as in the picture.
When that happens, you'll probably want to try the puzzle one more time. It's hard to quit!