Here are the positive instructions corresponding to the given negative instructions:
1. Please refrain from jumping on the sofa.
2. I would like you to walk instead of running now.
3. Could you please pick up your toys?
4. Please avoid pushing him off the slides.
5. Could you go to your room and clean up the mess?
6. Please keep your legs off the table.
7. Let's stop throwing the crayons.
8. I would prefer if you didn't sit near the door.
9. Let's lower our voices and avoid shouting.
10. Please wait for your turn to speak and avoid interrupting me.