My son loves curious george so we went with that theme for his first birthday!
Curious George, red, white, yellow and blue
Simple and to the point.
Birthday board: I made as a DIY but you can purchase from:
Happy Birthday Banner and photo banner: http://www.etsy.com/shop/everydayjoydesigns
Everything else was DIY. I just saw stuff on pinterest or etsy and made my own version.
I think the chalk board as it was the most labor intensive and I love all his stats.
Just be yourself and do what you like and you can make a great party DIY for little money.