This kit, with a some additional parts, allows you to make the Sand Tower shown.
You can make it any height you wish as extra parts are included. Ladder total length is 10cm.

In addition to the printed parts you will also need(Outside diameter):

2mm Brass Rod or Tube for the Center Support Rod
6mm Brass Tube for Sand Tank on Top
.5mm Styrene Rod for Top Supports, Sand Pipe Supports and Climbing Cage Runs
.88mm Styrene Rod for Side Sand Delivery Pipes
Copper Wire for Hoses