After a long break we build a full set of tracks again. On the first go I used the bridges, but the kids almost immediately destroyed them as they move the tracks on the wooden floor. So, the next version only used the simple overpasses that survive being shoved.
By now both kids push trains along. Now I have to make sure that a) Clemens’ train doesn’t expand by assimilating cars from Elena’s and b) that Clemens doesn’t just crash his train into Elena’s.