Here are some great sites for awesome wall stickers.
Another great thing to do is to get some colored contact paper and draw a design on the back, cut it out, and stick it on your wall! Instant custom wall stickers! Good luck!

75pc. Lighthouse Theme Removable Wall Sticker Decals by Collections Etc $6.97 Transform the look of any room when you decorate walls, furniture, windows and mirrors with these colorful decals. They re ready to use just peel and stick. Each is removable and reusable. Features 5 sheets (total of 75 decals) of lighthouse-themed artwork that conjures up an oldfashioned, historical look in any room. Sticker sizes range from 2" x 1/2" to 5" x 4".......

Coffee Cup Kitchen Removable Wall Decals by Collections Etc $8.00 Coffee artwork decals make a fun and fast way to perk up your walls, cabinets, appliances and more. Easy peel-and-stick application won't harm surfaces. Set includes 48 decals. Stickers measure from 3 1/2"H to 5 1/2"H. Each is removable and reusable.......

Vinyl Farmyard Cow Spot Removable Wall Decal Stickers by Winston Brands Give appliances, furniture or even your car a delightful down-on-the-farm look. Simply apply the easy-on vinyl cow spot stickers to any smooth surface for an udderly moo-velous transformation that's sure to milk plenty of smiling appreciation from all who sees them. Made of vinyl and the whole sheet measures 22.30"L x 15.50"H......

try this. its a great help.

http://www.kidsastronomy.com/

Real men wear aprons! The vinyl decals are computer die cut, removing the background leaving just the vinyl quote for installation. We use only high quality removable vinyl. Once your order is placed in most cases we'll prepare and ship the finished product within 24 hours. Please choose your color option from drop down manu below product title. Please see our color chart for available options. The vinyl lettering as s...

Harley Davidson Magnets These Harley Davidson magnets are great for your refrigerator or your filing cabinet at work!...

Peel & Stick By Just Kids KD1888 Galaxy Wallpaper $75.98 What are RoomMates? RoomMates are removable, repositionable, and reusable wall decals. They feature your favorite designs and popular characters, and can be applied to any smooth surface.How do they work? Our wall decals are easy to use: simply peel & stick! The special adhesive is strong enough to keep your decor on the wall, but delicate enough to allow endless repositioning without damaging the...

Well, I checked out their Website and unfortunately, they don’t have a trouble-shooting section, nor do they say what their wall stickers are made of, but I’ll try and help anyway.

1. Did you wash the wall you put them on first? If you didn’t and there is any grease and grime, this could be causing the problem, especially if you put them on a wall in the kitchen or bathroom. If this is the case, simply remove the stickers and wash the wall with liquid TSP. Don’t use the powder formula, as it’s hard to mix and is toxic. Plus you’ll have to rinse it off before you can do anthing else. TSP will remove all grease and grime. You’ll find it at any home hardware store and it’s relatively inexpensive. Once you’ve followed the manufacturer’s directions, let it dry completely and try to replace the stickers. However, if there is grease and grime from the wall that has adhered to the stickers, you may find you have the same problem. If this is the case, wash the backs of the stickers. I know this might not help them to stick after (and I have a solution below if that happens), but they aren’t sticking anyway, so you have nothing to lose, right?

Once you’ve cleaned both wall and stickers, use 3M scotch vellum adhesive. By spraying only the back of the stickers and not spraying the wall too, the adhesive remains repositionable. Position them on the wall and there you have it – sticking wall stickers! You can reuse this spray when needed and it won’t ruin the walls:

http://www.3m.com/cms/CA/en/2-209/newProducts/newProducts.html

75pc. Lighthouse Theme Removable Wall Sticker Decals by Collections Etc $6.97 Transform the look of any room when you decorate walls, furniture, windows and mirrors with these colorful decals. They re ready to use just peel and stick. Each is removable and reusable. Features 5 sheets (total of 75 decals) of lighthouse-themed artwork that conjures up an oldfashioned, historical look in any room. Sticker sizes range from 2" x 1/2" to 5" x 4".......

Coffee Cup Kitchen Removable Wall Decals by Collections Etc $8.00 Coffee artwork decals make a fun and fast way to perk up your walls, cabinets, appliances and more. Easy peel-and-stick application won't harm surfaces. Set includes 48 decals. Stickers measure from 3 1/2"H to 5 1/2"H. Each is removable and reusable.......

Vinyl Farmyard Cow Spot Removable Wall Decal Stickers by Winston Brands Give appliances, furniture or even your car a delightful down-on-the-farm look. Simply apply the easy-on vinyl cow spot stickers to any smooth surface for an udderly moo-velous transformation that's sure to milk plenty of smiling appreciation from all who sees them. Made of vinyl and the whole sheet measures 22.30"L x 15.50"H......