My 4 year old was more hesitant to let me try the Naspira. When she was a baby I used the same type of item on her, but from another company, she clearly didnt remember that. The Naspira is a silicone bulb that has a tube that you suck through. It comes with 7 disposable filters, so it isnt as gross as it sounds. It is highly effective though! And you can take it completely apart to clean and sterilize it.
I have been using NeilMed rinses for a few years and I have gotten comfortable with it. The first time I tried it, I think I almost drowned myself. I also didnt realize you were supposed to use distilled water ONLY. That is very very important. Now I boil a pot of water for 5-10 minutes and then let it cool before pouring into the bottle with the saline solution.
If you visit the NeilMed.com website, they tell you exactly how to use these products and they demonstrate in videos too. You can order directly from their website and get free shipping! Use promo code "MOMSBLOG" for $3 off. You will also find various other products: ear care, first aid, and many different types of sinus rinses in case you arent comfortable with one type or another. I personally like the Sinus Rinse more than the Netipot, but that is just me.
Disclaimer: I was given these products to try out in return for my honest opinion. All opinions are 100% mine and not influenced by anyone else.