Don't Drop That Beat! Make Your Meter Clear
Some resources will say to strive for perfect meter, but in reality, a lot of rhyming picture books will not have perfect lines with exactly the correct number of syllables. You can actually add or subtract syllables for "metrical variance." This will help you fit words you wouldn't have been able to fit, or to change up the feel a bit. HOWEVER, once you've established how many feet you have in each line, you should not vary the number of STRESSED syllables. You can add or subtract unstressed syllables with care. As a musician, I thought rhythm and meter would be easy to do in my writing. But I fell into one of the major pitfalls. Reading picture books is not the same as listening to a song (or even singing a song). In music, the beat and meter prescribes where the stresses go. You can sing words longer than a beat. You can have "rests" where you pause your singing and the beat will remain constant. But there isn't any sheet music to read or recordings...