I made a snowflake themed party for my 1 year old daughter's 1st birthday in January. It was pretty, pink, robin's egg blue and glittery like frost. I made some cupcake toppers with scrapbook paper, skewers, and snowflake stickers, along with some dollarstore white styro snowflakes...And I made the banners with the same scrapbook papers, as well as some old fashioned paper chains with snowflakes added on the bottom! Also I used those "decorate them yourself" crowns from the dollar store and glued the leftover bits of scrapbook paper onto them...
The cheap snowflake ornaments I got leftover after xmas from the dollar store!!
I used some puffy and glittery snowflake stickers on top of coordinating scrapbook sheets to make it wintery.
the Cupcake toppers!
Just go with whatever is cheap, and spend a little time creatively making it into something special.