Try this DIY Cat Tortoise by Aikiou. Materials: empty egg carton; non-toxic glue; scissors; a pencil; crayons; 4 binder clips. Instructions: 1. Cut one egg compartment out 2. Put the egg compartment on the reverse side of the egg lid and outline contour and the second bump 3. Cut the lid following the outline 4. Apply glue around the cover 5. Put clips on the 4 corners while glue dries 6. Decorate your turtle 7. Put kibble or treats inside for your cat to find!