Manipulative enrichment. Download the book (free) Enrichment and Well-Being of Mammals in Captivity in English or Spanish on enriquecimiento-ambiental.gowildpanama.org Over 250 pages with detailed information and photos on the types and stages of environmental enrichment, plus a chapter on animal rights and animal welfare with tools for measuring animal welfare in captive settings.
This would be great to fill with frozen/sticky food! Each tube spins. You can thread through center pvc if giving to strong/destructive animals. The bottom pvc is filled with sand to help keep it upright.