All 3 of those are excellent choices - I love the multitab, I'm very excited to play with the greenhouse once I get back to really playing again, and the toddler items look very, very useful.
If you're into toddlers, the baby swing can be a real lifesaver - it's a little cheaty, but it's a great way to do all the fun things with toddlers without having to do so much of what I find to be the monotonous stuff like feeding and changing diapers. On a related note, I've heard good things about the baby sink (or something like that) that allow sims to give infants and toddlers baths along with nifty moodlets. I can definitely vouch for the swing though, that thing is wonderful.