Lillabo Rail Joint

My little son like to put the train run from high. But the rail connections are too loose to hold such a single rail fly on the air. When he plays with the train, I need to hold the rail for him. So I made this thing to free my hand.

I measured each rail part, and took the average width and height of the rails. But there are still one or two parts have even 1mm thicker in height. So I cut the wood by knife without modifying the design.

**Update 2018-01-14**

The trains run too fast and a