Yes! I just did this with 25000 pieces I got on FB market place.
Identifying what you can build: You want: rebrickable.com
- Add any sets you have.
- Add any parts you have.
Then you can search for what you can build - filtering by exact colours/close matches/any.
You can also filter only official sets, alternative builds for official sets and MOC (make own creation - builds other people have come up with - both paid and free)
Identifying Parts: Finally as someone who took weeks adding all my parts and only discovered this app in the last few days…
This website you can take a photo of any one piece and it will give you the part number so you don’t have to hunt for it on the rebrickable parts list. It is astonishingly accurate!
Other tips: Sort your parts first. I went through 2 key stages…
- Reduce to broad categories: brick, plate, bracket, minifigure etc.
- remove every part of one type at a time regardless of color and then add them etc.
With rebrickable you can just select 1x2 brick and add 10 black and then just quickly change number and color to 8 green etc. So colour’s are not worth sorting til the very end!!
Plus identifying all the green 1x2s in a pile of 1x2s is a LOT easier than identifying all the 1x2 greens in a huge pile of green stuff.
I’ll stop now as it’s becoming a wall of text but any questions feel free to ask!
Do it! I cannot stress how much fun it is to discover that your handful of sets can also be built into a dozen other cool things. Especially if you struggle to come up with amazing ideas yourself, the more sets you find you can build, the more you’ll learn.
On that note - if you haven’t played with Lego since you were a kid like I did … you are about to be blown away by how cool some of the build techniques are and what they can accomplish.