So I bought these Sally Hansen nail apps when I went shopping at Priceline for that goodie bag.
Pretty straight forward, just pick the sizes that fit best and whack them on your finger nails
I found them a bit fiddly though, and I couldn't get them on smoothly (it might just be my poor skills and it was my first time!) but I seriously wanted to give up half way through. I'm sure practice makes perfect, but I think it's way more effort than painting your nails.
I like the pattern though - it's very Alice in Wonderland and I received so many compliments on it too!