This activity features a box with a round hole in one side of the top, along with a soft ball.  The top of the box is open on the other side for easy retrieval of the ball.  The ball itself has a firm core with a knit covering, and is slightly larger than the hole so that it takes a small amount of effort to insert it.  The box measures 29 cm x 17 cm x 13 cm (about 12" x 7" x 5").