4. Use the rubber mallet to gently tap the sides of the trays to release any air bubbles within the cement.
5. Place the leveling tool on top of the filled trays to ensure the surface is even.
6. Allow the cement to cure in the trays for the recommended time, typically 24-48 hours.
7. Once fully cured, carefully remove the cement slabs from the trays, ensuring they do not crack or chip.

Variations & Tips
For added visual interest, consider embedding colored glass pebbles or small stones into the surface of the wet cement before it cures. This can add a pop of color and texture to the slabs. Alternatively, you can use concrete dye to tint the cement, creating slabs in various shades to match your outdoor decor. Another option is to apply a clear sealant to the cured slabs for enhanced durability and a glossy finish, which can protect them from the elements if used outdoors.