Even if you don't have much of a budget for seasonal decorating, there are some easy and fun things you can do to brighten up your tween's space. A fresh coat of paint in a brighter or lighter hue will instantly change a space in a way that your tween will appreciate, and paint is the cheapest way to make a big impact on a room. Accessories are another way to add some spring touches without a total makeover. Swap out the cold weather down comforter and duvet with a brightly colored antique quilt. Change out pillow shams or throw pillows on the bed with those in a spring color palette, and stash the neutral winter rugs in favor of bright floral or striped patterns. Lime green and hot pink are a great spring palette for girls, while royal blues and bold oranges are better choices for tween boys.
Handmade objects will bring a personal touch into your tween's room. Window treatments made from colorful aprons hung on cup hooks are a unique touch that adds some spring flair. Find cheap artwork on Etsy to hang in inexpensive frames, or better yet, hang some of your tween's own handiworks.
Removable decals are a great way to transform walls, or for something more permanent, paint a colorful graphic in an area where it becomes an artsy focal point. When it's time for a change, just paint over it. Fresh flowers are a great way to bring life into a room, but a weekly flower habit can get expensive, and allergies are also a consideration. Instead, cover foam balls in pretty silk or hand-make fabric flowers for a spring touch that lasts through the season. Hang them from the ceiling or arrange them in a bowl on the dresser.