Here are some jokes and riddles related to toasters:

1. What do you put in a toaster? Answer: Bread.
2. Spell "roast." Spell "coast." Spell "most." Then ask them: What do you put in a toaster? Answer: Bread.
3. If you put roast in a roaster, what do you put in a toaster? Answer: Bread.
4. Another one is to have them spell most, roast, coast.. etc... anything that rhymes... ask them what you put in a toaster.. they will obviously answer bread.

These jokes and riddles play on the idea that the answer to the question "what do you put in a toaster?" is obvious, but can be misleading if the person being asked is not paying close attention.