The puzzle before you contains 5 pieces.
Take the pieces out, and overturn the frame.
On the other side of the frame you'll find a different frame.
Try to insert all five parts into the frame.
The extra bar should go inside the frame as in the sketch.
Be aware that this is a 2D puzzle, and all the parts must be flat.
Good Luck !
Age : 8+
Package : Shrink
Level : 4
Weight : 180
Size : 20*155*110