Making toadstool decorations for your garden, a terrarium or even to wear as jewellery, is easily done with polymer clay. Polymer clay is inexpensive and simple to work with because it can be baked in a conventional oven. With polymer clay and a few other craft materials, you can make one toadstool or a whole set of them that look exactly the way you want.
Pull on a pair of rubber gloves so you will not leave fingerprints in the clay. Break pieces off a block of polymer clay and soften them in your hands. Once the pieces are softened, combine them into a larger ball again.
Roll the clay between your fingers into an oblong shape. Make 2/3 of the length narrow, for the toadstool's stem. Leave the last 1/3 of the piece thick, for shaping into the "umbrella" of the toadstool.
Press your fingertips gently on the bottom of the thick section to flatten it. Use your fingers to mould the top of the section into an umbrella dome. Roll the stem section between your fingers to give it a tapered, rounded shape. The bottom of the stem needs to be wide enough to support the weight of the toadstool.
Press the tip of a needle against the bottom of the umbrella, going all the way around to make the gills of the toadstool. Gently press the tip of the needle on the sides of the bottom of the stem to make striations.
Break tiny bits off the block of polymer clay. Soften the pieces in your hands and roll them into balls. Flatten the balls slightly and gently press them to the top of the umbrella to make bumps on the toadstool.
Preheat a conventional oven to the temperature indicated on the package of clay. Stand the toadstool on a baking tray. Place the baking tray in the oven and bake it for the amount of time specified on the package. When the time is up, wear an oven glove to remove the baking tray from the oven. Wait at least one hour for the toadstool to cool.
Paint the toadstool with acrylic paints. Allow the paint to dry and coat it with clear acrylic varnish. Allow the varnish to dry thoroughly before handling.