Most Helpful Girl
A 3 year olds birthday party in sunny and perfect Florida?! Sounds good to me! Anyways, wear a cute floral and bright sundress. A sweetheart neckline with spaghetti straps and an empire waist but still semi- form fitting. The hem should fall about mid-thigh. You should also wear a pastel colored cardigan. As for shoes you should wear some cute pumps that go with your dress but aren't to high, but if the kids party is involving grass or a lot of activity for the adults I would wear a really cute pair of gladiator sandals. I agree with the other person you should be conservative because you don't want them to think badly of you, but also you want to look fun and outgoing and still a little flirty so they don't think that your a stiff and stuck-up because they want their son to be happy and in a good relationship, which it sounds like you are if you are flying to Florida to meet his family.
Here are a couple of suggestions!
^This would probably be really cute in the 'frosted sage heather' or the 'winter white'
^Any of those colors would work.
^Honestly? These would be absolutely perfect!