We were using my wooden bottle openers over the holidays and my Grand-son-in-law; suggested that I make some of these.
They are oak, and the wheels are also.
The finish is a light torching then a wipe on to keep the char in place. Wheels are unfinished, but the axles are waxed to keep them turning easily!
Pattern is an rjR--- .
I did actually lay this out before cutting, usually do NOT on my toy cars. I also cut templates at the time of the original cut!
An addition to the comment from original== YES; these are "Bottle tested veterans".
I have made enough to cut the opener part without a real pattern! Cut a bit small if in doubt then open wider/ deeper with a file or re-saw it!