Mix the concrete with water: Once all the supplies are gathered and ready to go, start combining the concrete mix with the some water in a bowl. Then blend them together with the spoon to create a smooth paste.
The next step is to pour the concrete mixture into the silicone moulds. We chose a heart-shaped mould because we wanted the knobs to look like little hearts but you can definitely choose a different shape if you want to.
Remove the concrete hearts from the mould: After the concrete has hardened, go ahead and pop out the little hearts. Be gentle so you don’t damage them. The silicone mould is flexible so you can easily bend it to make the process easier and smoother.