Rhyming only two lines is not cheating. You will find that the majority of poems written for children will use this rhyme scheme. Let's try a silly summer poem. The sun came out and so did we, It was me and my two sisters. We lazed around, soaking it in, Three sisters now have blisters.
Tomorrow is another day.
We'll make some lemonade. And we'll drink it in the shade. AND you only need two in a four line verse. The flowers bloom. The sky is filled with blue.