• Hot dogs (unless cut in quarters lengthwise before being sliced)
• Hard candies, including jelly beans
• Nuts
• Chunks of peanut butter (Peanut butter may be spread thinly on bread or a cracker—but never give chunks of peanut butter to a toddler.)
• Popcorn
• Raw carrots, celery, green beans
• Seeds (such as processed pumpkin or sunflower seeds)
• Whole grapes, cherry tomatoes (Cut them in quarters.)
• Large chunks of any food such as meat, potatoes, or raw vegetables and fruits
   

Source

Healthychildren.org