Make sure the pieces are together. Give it a reasonable price. List it on Craigslist or take it to a children's consignment sale. If it's a collectible, offer it in an eBay auction.
There are many websites online that sell the B. Zany Zoo Wooden Activity Cube. Target and Amazon online website both have this activity cube item on sale.
They could carve it into figures or something like that...like small wooden statues...kind of like that...
Puzzle No 41: Cube Halves, Location: Carnival Street. Answer = The odd block is the (C) block.
The mass and density are very different.
The only problem that I can see is that your cube is too large. Any wooden cube with a width smaller than the diameter of the cylinder should slip right in. If you have this problem, it means that your cube and your cylinder are mismatched.
There is no reason to sell an ice cube in Antarctica.
Target does sell wooden toys and they have quite a variety available online. You can buy many puzzle type games in a wood format. Here is a popular wooden toy available with great reviews: http://www.target.com/Melissa-Doug-Wooden-Toy-Abacus/dp/B00005BVRQ
its the best puzzle
The bonus puzzle solution was Wooden Gavel.
Rubik's cube.
1980 The cube was invented in 1974, although it was first sold as a puzzle in 1977.
Puzzle No 110: The Vanishing Cube, In the Manor Parlor, Tap the chandelier above the large man Gordon to find a Hidden puzzle. Please see the Related link below for a walkthrough of puzzle 110.