Personally, I love mixing the softer hues and muted pastel colors into my Spring nail art. Stripes and polka dots are my favorite as they are simple to do at home. (I get frustrated when I mess up perfectly beautiful nail polishes.)
This bright polka dot nail art was designed by the lovely Becoming Gorgeous. Just pick up a toothpick or any nail design pen and dab on the polka dots over the nail polish. Using white dots rather than black gives a more Spring/Summer vibe.
This lovely multi-colored pastel nail design from PSHIIIT has been on top of my inspiration list for a while. It is very simple to do and allows for creativity by mixing up the horizontal and vertical lines just a bit.
If you are looking for a really cute design, I recommend this Bow Mani art design by Kristin over at The Beauty Department. It requires a little more tact than I would like, but the outcome is absolutely gorgeous!