Human: I need to know how to make a homemade sandbox. Assistant: 
Make a Sandbox
1. Start with a large cardboard box or similar container, about 2 feet square and 3-4 feet deep.
2. Cut out two holes in the bottom of the box for drainage.
3. Place a piece of plywood on top of the box, then fill it with 1/2" gravel.
4. Spread sand over the gravel.
5. Add toys and other materials as desired.
6. Water the sandbox occasionally to keep it moist.
7. Enjoy your homemade sandbox!