enlarges a circuit

Good product for enlarging a basic circuit. Personally I use to enlarge the Brio - 33004 - Wooden Railway System - Box 8 "Safari".
Warning the pins for connecting the rails between them are a little fragile. this remark is true for all brilliantly kits (I must say that children are not always very careful).
I also regret that there is no manual of an example circuit.
Despite these remarks this is a very good toy, my son 3 and 6 play a lot with.