Vegetables: 

• Small pieces of raw vegetable (like raw carrot rounds, baby carrots, string beans, or celery), or other raw, partially cooked vegetables
• Raw green peas
• Cooked or uncooked whole corn kernels
• Large, hard pieces of uncooked dried vegetables

Fruits: 

• Apples or other hard pieces of raw fruit, especially those with hard pits or seeds
• Large, hard pieces of uncooked dried fruits
• Whole pieces of canned fruit
• Whole grapes, cherries, berries, melon balls, or cherry and grape tomatoes

Protein-rich foods: 

• Tough or large chunks of meat
• Hot dogs, meat sticks, or sausages (even when cut into round slices)
• Fish with bones
• Large chunks of cheese or string cheese
• Peanuts, nuts, or seeds (like sunflower or pumpkin seeds)
• Chunks or spoonfuls of peanut butter or other nut and seed butters
• Whole beans

Grain products:  

• Plain wheat germ
• Whole-grain kernels
• Crackers or breads with seeds
• Nut pieces
• Hard pretzels

Other foods and snacks:

• Hard or round candy
• Jelly beans
• Caramels
• Gum drops, gummy candies, or other gooey or sticky candy
• Chewy fruit snacks
• Chewing gum
• Marshmallows
• Popcorn, potato or corn chips, or similar snack foods
• Ice cubes