The four cans serve as a center line on a table. A table tennis ball is tapped on the table so that it hops into a tin can. You play together, it always goes back and forth.
4 tin cans are glued to each other with hot glue.
Place a row of cans on the middle of the table.
Here we go!
The ball is tipped so hard on the table before the cans, that hopefully it will end up in a can.
If you trift, you score a point.
The difficulty level can be increased by more distance. Or by using a topsball.