Stepping stones are a common landscaping feature that allow you to cross through water or a garden. Stepping stones are most commonly a decorative element, crafted in different shapes to accent an exterior. Shapes such as footprints are common, typically meant to symbolise an element within the particular space. According to Sherrie Warner Hunter, author of "Making Concrete Garden Ornaments," concrete is one of the most versatile materials from which to make shaped stepping stones. Only a few simple supplies are necessary to make a stepping stone in any shape you desire.
Wash the wooden board to ensure it is free of dirt and debris.
Draw the outline of a footprint, as large as you would like your stepping stone to be, onto the wooden board.
Sculpt the outline of the footprint onto the board, using the oil-based clay. This is the mould to your stepping stone. The clay of the footprint outline should be as high as you would like your stepping stones to be. To keep the concrete from breaking, the walls need to be at least 3 inches high. Additionally, the wall should be 2 inches thick to retain the concrete when pouring and setting. Make sure there are no gaps for cement to seep through in the footprint's outline.
Mix the quick-setting concrete in the bucket per the manufacturer's instructions. The concrete mixture should be a thick, oatmeal-like consistency when mixed properly.
Pour the concrete into the footprint mould on the board, filling it to the top.
Use a putty knife to level the top of the concrete within the mould. Do not worry about spilling concrete over the sides, as this will not affect the stepping stone.
Allow the stepping stone to dry indoors for four days.
Peel the clay away from the board and concrete. If you have trouble grasping the clay with your fingers, use the putty knife to slice it into manageable sections.
Wedge the putty knife between the board and the concrete until the stepping stone pops off.
If you would like two different footprints, draw a second in Step 2. Push small coloured pebbles into the wet concrete after Step 6, to add colour and texture.