Correct sentence: Press the seeds of this plant to get sunflower oil.
Is the original sentence okay? Yes. "Press this plant's seeds to get sunflower oil." is grammatically correct. It is an instruction (a command) and ends with a period.
Why I suggested the change:
- "Press the seeds of this plant" sounds a little clearer for young readers than "this plant's seeds," but both are correct.
- "Press" means to squeeze. "Seeds of this plant" tells us which seeds to press.
- Always put a period at the end of the sentence.
Simple alternatives a 6-year-old might like:
- Squeeze the seeds of this plant to make sunflower oil.
- We press sunflower seeds to get sunflower oil.
If you want, I can make the sentence even shorter or more fun for a 6-year-old. Which would you like?