A dandelion is a type of weed that commonly grows among grass, usually showing as a yellow flower that eventually turns into white fluffy heads. Taking the idea of the flower and turning it into a play on words can use the word "dandy" and pair it with "lions." The visual image would then have the body of a man wearing a suit to invoke the idea of a "dandy" with the head of a lion.
Eggplant is an easy word to make into a pun. While the original word refers to a specific vegetable, for a visual pun use a base plant which has leaves and then put pictures of eggs where the flowers are located. The eggs can take any preferred form, from unbroken to broken open with the yolk and white clearly visible.
The typical notebook is a small book of plain lined paper used for taking notes during classes, lectures, presentations or seminars. To create a visual pun of the word "notebook," a large hardback book with a plain cover is used for the base and a large music note is put into the cover. This invokes the idea of a "note" and a "book" to get the pun.
A fast food pun pokes at the idea of food that gets away. Fast food is used as a term of getting meals quickly without waiting for fifteen or thirty minutes. For a visual pun, a piece of food such as a hamburger, sandwich or even fruit or vegetable is given a pair of running legs. It creates the idea of "fast food" because it is running quickly.