I wanted to make a banner that would last, so that we can pull it out every year and re-use it. We liked the idea of a spring theme, and I threw in some Hawaiian flavour with the aloha prints.
It was VERY easy to make. I found this excellent tutorial online which I used to make the banner. It is a threaded banner (yay, no bias tape!). I added felt lettering to it (I simply found a font I liked on Microsoft Word, printed the letters out, and then cut them out of the felt). I had originally set out to do the letters in different colours, corresponding with the fabric, but I thought the letters got kind of lost that way, so I ended up doing all blue lettering.
To attach the letters I sewed around the edges each one with a machine, but I am sure you could use double sided applique paper and just iron them on if you didn't want to sew. But, honestly, it took me about 20 minutes to sew them all on, and I think it is worth it because now they will last and make it through the wash too.