Which is better an iPhone or. Trampoline?

My birthday is coming up and I don't what to get should i get an iPhone or a trampoline oh and keep in mind I already got justin bieber tickets for my birthday this would be my second birthday gift

Aside from your poor taste in music, it's a personal preference. If you already have a phone I'd go for the trampoline… If you go with the phone though, get an Android. You'll thank me later.