I like the style of your banner and how it ties in with your display pic logo. The yellow and colouring is nice, but I think the title in your banne is a little wordy. I'd personally change it to "turning discurded items into original art" art tends to encompas a veriaty of subjects, and with the characters you've got it's easy to see what the art is.
In the photos of the banner, they're a tad busy. the photo of spiderman has too much rocks in it, it takes a while to see spider man, so I'd zoom in a little more on spiderman in that photo. The panda and kinda blends in with the white and black in the background. if you can, I'd re-take that photo of the panda and bambo on pure white like you did with spiderman.
The landscape shot is way too buys, too much going on and clutters up the banner a bit. I'd find a less cluttered photo along the lines of spiderman. And while the character in the black background is cute, it kinda throws the balance off a little. It still works well with the yellow banner and contrasts with your logo, and shows a dark background will work for your banner as well as white does, but personally it throws of the balance a bit to me.
overall I'd give the banner a solid 7/8 out of 10.
In terms of thumbnails, some of them are good, some of them are confusing, and some of them are way too cluttered. The DIY Upcycle genie's shelf is doing well in terms of views, but I find it a bit cluttered, it's hard to make out what it is.
The boat sail? the pen tree, and the windmill is hard to know what's going on because the background has too much focus on it, and steals the focus away from the main subject, and that seems to be a running trend with your thumbnails.
If you can, I'd go through your craft and super blur out the backgrounds if you can, or find a less cluttered background to photograph them on.
The flamingo wall decor is great, it's simple and easy to tell what it is, the disney trinket boxes are good clear and simple, and the minion photo is fantastic. so I'd try and keep your backgrounds is plain and simple as you can.
Overall though, your views are good and you've had a solid year it looks like
so if you can tidy up your channel banner and thumbnails and make them straight to the point, I see a strong future for your channel
Great stuff!