To make it even funnier when filling in the blanks, use unexpected words. For instance, if the story is about a knight in shining armor and there's a blank after he rides his horse towards a dragon, instead of a typical word like 'charged', you could use 'wobbled'. It adds an element of surprise and humor.
One possible book could be 'Alice's Adventures in Wonderland'. For example, if the blanks were related to the part where Alice falls down the rabbit hole, we could fill in words like 'curious' to describe Alice, 'deep' for the rabbit hole, and 'unexpected' for the things she encounters. This would help create a story based on the classic tale.
How about this: 'At the party, there was a [mysterious] gift. Everyone wondered what was inside. It turned out to be [a surprise] and made everyone [laugh].'
One tip is to look at the context of the story. For example, if the story is about a clumsy detective, and the blank is right after a description of him chasing a suspect, a word like 'tripped' might fit well. Another example could be a story about a magic show where a magician is about to perform a trick and the blank might be filled with 'abracadabra'.
Involve pop - culture references. If the fill - in - the - blank has a 'person' part, you could say 'The Harry Potter - like wizard [action] the [object]'. It catches people's attention as they are familiar with the reference.
One way to make it more interesting is to set a theme. Let's say it's a 'fantasy' theme. Then all the words you choose for the blanks should fit that theme. So instead of a normal 'house' you could say 'elf - tree - house'. Also, adding humor elements like puns can make it great. If the blank is for a verb near 'water', you could say 'splash - dance' instead of just 'swim'.
Simple! Use simple words and familiar scenarios. For example, 'The [cute animal] likes to [play activity] in the [nice place].' Kids can easily think of words like 'cat' for the animal, 'jump' for the activity and 'garden' for the place. You can also base it on popular kids' stories, like 'In the [enchanted forest], [fairy - tale character] met a [mystical being].'
Here's another. A story about a pirate. 'The (pirate) was looking for his (treasure) on the (island). He dug a (huge) hole and found not gold but a (plastic) spoon. This shows how by changing the expected discovery in a fill - in - the - blank story, we can create a humorous situation. The pirate expected something valuable like gold or jewels, but getting a plastic spoon instead is quite unexpected and funny.