Cross Pocket Puzzle kids The Bird Call's sound is

The Bird Call's sound is produced by rotating the wooden cylinder against the cast zinc plug

during which time it survived several devastating earthquakes until it was demolished in 1968

White gloss finish

The brilliant designers at iDventure continue to challenge themselves (and their fans) with new and ever more sophisticated mechanisms in their puzzles

Cross Pocket Puzzle kids The Bird Call's sound isThis two tone pocket puzzle is classic in form and novel in function. When the silver and gold colored pieces are combined, they form a compact square with a plus sign subtracted from the middle. Though the surfaces and the symbol of the puzzle are composed of right angles, once you begin to jangle the pieces apart, you will notice hidden notches which allow the elements to rotate and revolve in surprising new directions. A good choice for beginner to