OMG Some of these are so cool, I love the whole wall/entertainment center: https://www.lizmarieblog.com/2013/07/top-10-wood-crate-projects/
Depending on the size...
...Keep towels in it and put it on the vanity in the bathroom
...stand upright and put shelves in it for a spice rack
...store onions, etc. in it
...hang on the wall in the laundry room and use for detergent, dryer sheets
...store sheets in it
...hang on a wall and put a teddy bear or two in it
There are many more uses in addition to these.
Not a craft but I used crates for storage in a very small toilet area. These have been up many years and have been very useful
Here's one of my favorite crafts you can make using crates! It's a two in one! Since you like doing crafts, why more organize your crafts with a craft you make!