I have a few favorites.
1. The OXO wipes container. I would never have purchased this myself. When i got it, I was like, huh, why would I need this? I was so wrong, it is so awesome!
2. Lula clips. I never knew these existed, but they are awesome.
3. a Lovey/Taggie blankie from this Etsy seller:
https://www.etsy.com/shop/mylilluvbug?section_id=6844837
It was great because DS absolutely loves it and it started getting a bit ragged, so I was able to contact the lady who made it and get 2 more exactly like it, so now I can alternate them and he always has one (of course, he doesn't know there are actually 3 of them, that would blow his little mind!). I don't have to worry about washing it and him freaking out about it not being available.