This file is a collection of 50 photo cards formatted for business card paper (but you can just cut if you prefer) that you can use with a bunch of different sort and categorizing. I made them years ago and had to remake because I lost the file (don'tcha hate that) but the kids wore them out! I used them initially as a Science explore activity and the students found many more valid categories than I would have. Then I guided them to sort by physical properties and then again for states of matter.
To my surprise, the kids began to use them for play, making up gin-rummy type games (deal 7 and put down at least three in a set) that required them to be creative thinkers! For example a picture of four colorful tee shirts on a washline could fall into gas or solids categories, by color, by material, "things you wear", renewable (cotton) or inexhautible (wind power) categories. Don't give the kids rules and they'll start thinking out of the box.
When remaking them, I made sure there were several for each possible sort I could think off. Now -- you will have to kill some printer ink. I always make a deck for table groups. And I highly recommend printing on cardstock and/or laminating because my third graders have always used these multiple times
I didn't do anything cutesy so the pics are all from all credit free sources and the optional card backs that say Property Sort (which for some reason printing two sided makes them more appealing) are just word art.
Please tell me how your classes used them!