My five year old daughter made this out of mathlink cubes:
She put them all together in the same pattern – I store them in 10 blocks of the same color. She carefully followed the same pattern each time. The center block stack has an extra orange block to raise it up higher. I was highly impressed with her tower design, though she insists that it’s a castle.
I think it’s also very important that young children, particularly girls, get the chance to play with different blocks because it promotes spatial-learning skills. There are gender differences in the spatial ability as early as the 4 1/2, as found in research conducted by the University of Chicago.