We already have slats so I was planning to skip these but I really wanted something small enough to make ball runs with so I went for it. They are great for that, and we've enjoyed using them as other things as well. They look beautiful when cleaned up and put away in their box, but that means a) sorting them by color and b) carefully putting them in the box--every one has to be in the perfect position or they don't fit. That's obvious from the photo, but I think they get played with a little less because they are tougher to put away.
My kids love making ball runs and towers out of these. We find different things to make with them everyday! So much fun!
I was seriously on the fence about these, but gave them a shot and I am so glad I did! These have turned out to be our #1 played with item. They are incredibly versatile...from roads, railings, buildings, bridges, to tunnels. They even stand up tall or on their sides if you slide them into the carpet. The only issue is that I have to clean them up every single day.