The above does not need to be anything fancy, in fact just so long as they are solid how they look doesn't matter.
The reason they are required is that I seem to have acquired two young helpers, that want to make models for my train set. Well I can't have them scattered about the house doing their own thing without proper supervision, (yes before any one ask's, I do need them to supervise me this involves sharp knives etc.), so if anyone can help or point me towards someone that can help I'll appreciate it, Ta.