An attractive design consisting of six groups of cannon balls in various shapes that must come together to form the pyramid stack. There is a simpler version of this puzzle that uses cannonballs attached in straight line segments only. This one uses the shapes shown below and is considerably more difficult. 

Dimensions: 4.24" x 4.25" x 3.75"
Difficulty level: 2 (out of 6)
Suggested age: 5+