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Tobacco - Tobacco is technically edible and even has natural antiseptic and anti-parasitic properties, although it's not very nutritious.

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Chalk - Chalk is non-toxic and high in calcium, however shouldn't be eaten for a prolonged period of time or in high quantities as it can cause health problems.

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Glue - Glue is non-toxic, which means that you can technically eat it, though your body won't process it. It will still cause stomachaches if consumed too frequently. While it probably shouldn't be your next menu item, don't be too worried if your kid gets a little experimental.

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Tree bark - After scraping off the rough exterior, the interior cambium layer is tasty.

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Worms - Earthworms are a good source of calcium, iron, and protein, but be sure to stay away from parasitic worms.

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Leather - Leather is edible as long as it's boiled for a long time before eating.

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Eggshells - Eggshells can be ground up and added to dishes for an added source of calcium.

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Gold - Gold is inert and passes straight through the body, making it a pretty garnish for baked goods.

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Stinging nettles - Stinging nettles lose their stinging properties once boiled down, and can be used in a variety of foods and teas.

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Avocado stones - The avocado pit is rich in fiber and antioxidants. They can be blended into a smoothie or added to yogurt. 

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Cockscomb - Most people don't think of eating it, but that red wiggly thing on top of a rooster's head is edible and served in a lot in French, Italian, and Chinese cuisine.

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Clay - Clay contains magnesium and other minerals that are good for your body.

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Paper - Paper is safe to eat in small quantities. It is chemically treated, so it's best not to consume too much of it.

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Dandelions - Dandelions are high in antioxidants and make a great wine or tea.

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Play-Doh - If your child decides to taste this popular molding material, don't panic. It is non-toxic and made with edible ingredients, such as flour and salt.

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Pansies - Pansies are an edible flower that can be used for decoration.

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Carnations - Carnations are another edible flower perfect for pastry decorations.

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Armadillos - This isn't the first animal you'd think of when you're planning dinner, but it's a tasty one.

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Cauliflower leaves - This part of the vegetable is typically thrown away, but it makes a great vegetable side dish or addition to a salad.

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Peach leaves - Although they can be poisonous in large quantities, peach leaves are great for adding flavor.

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Purslane - The weeds that typically grow in sidewalk cracks contain high counts of omega-3 fatty acid and are a tasty addition to many dishes. Just make sure they're in a clean area and not dosed with any pesticides.

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Crickets - Incorporated into many cuisines around the world, this insect is high in protein. Feel free to experiment with this one!

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Corn silk - Corn silk is really good for bladder health.

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Cacti - The spines may look more painful than delicious, but after being properly prepared, it can be eaten raw or cooked.

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Zucchini flowers - These flowers can make a delicious side dish. Try stuffing them with ricotta and deep frying them.

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Strawberry tops - The short, spiky leaves are full of nutrients that can make a great addition to your fruit smoothie.

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Beetroot stems - Try them sauteed with garlic and olive oil.

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Citrus peels - Just like with most fruits and vegetables, the nutrients are packed into the peel. Use citrus peels to add some zest to your meals instead of throwing them away.

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