These are nice, and I like the subdued / weathered colors.  I would proably use one block at a time either on the floor as plastic houses on a vinyl / felt mat (for the roads and yards) for a small child and its toy cars or as highly detailed models on a Hot Wheels (tm) car + electric train combination table for older kids to enjoy.

(When I get rich and have a big house, there will be this room, see, with several such interconnected tables and a master control board.  Huzzah!)