I can use a neti pot on my 3 yr old daughter. Enough to get a lot of saline water up there & then she can blow it into the sink and blow her nose. I use it on my older son too now, he's 5, but I think I was still using the "nose sucker" on him too when he was 3! He would NOT blow his nose. He finally got the hang of it. I did use lots of saline drops & I would close one nostril off and just suck and suck until I got it all out. Good luck!