This is our play tunnel

Row 1, cell 1 Row 1, cell 2 Row 1, cell 3
Row 2, cell 1 Row 2, cell 2 Row 2, cell 3
Row 3, cell 1 Row 3, cell 2 Row 3, cell 3
Row 4, cell 1 Row 4, cell 2 Row 4, cell 3