Any cardboard box, scissors. How to make it: Cut 3–4 circular holes (big enough for a paw, not a head) in different sides. Close the box flaps. Pro tip: Add a small ball inside before closing. Kitty will spend 20 minutes trying to fish it out.
: To test the engine, Byte approached the kitchen counter. He nudged a glass of water toward the edge. Observation : Gravity is functioning at 100% efficiency. bored kitty %5Bv0.2.1%5D