Well, to describe squeaky in a comic, you might show a character wincing or covering their ears to indicate the unpleasantness of the sound. Also, you could draw wavy lines coming from the source of the squeak to emphasize it.
You might want to check out 'PAW Patrol'. It has cute characters and exciting adventures that keep kids engaged. Also, 'Dora the Explorer' is well-known for its educational and fun elements.
The reason why the hammer could not break the egg was because the hammer was harder than the egg. In the brain teaser, the question deliberately confused the meaning of the word " hammer ", making people mistakenly think that it was asking if the hammer could break an egg, but in fact, it was saying that the hammer itself could not break. Therefore, the reason why the hammer could not break the egg was because the hammer was stronger than the egg.