All soaps in the picture are carved with a thai knife. I used some techniques I learnt in Japan.
Here you can buy a thai knife (the same as mine). The set of soap carving tools can be useful as well.
Fruit And Vegetable Carving Art for beginners and pro. Watermelon carving, fruit and vegetable arrangements, food garnishing techniques, step instructions and tutorials to fruti and vegetable carving art for beginners and advanced carvers.