So I have android phone and I wanted to know why I can't send or trade people my gifts, like the showcase ones?
If you're talking about things like the hot tub, party trophies, or items brought in the store, they can't be gifted. If you're talking about scavenger items, male sure you haven't sent 10 gifts to that person, they can only have 10 pending gifts per person. If that's not the case, restart your app.