The idea of scaling is really important in mathematics, and everywhere in the world, so in Year 4 we've spent seven days exploring it in different ways.
❶ We started off by scaling up shapes drawn on grids. We looked at this:

This is what Rod drew 
Then we made some scaled up shapes ourselves. And we had
lots of them (sometimes it went wrong the first time, an we had to redo it):
❷ The next day we made designs with pattern blocks, with a certain ratio: two triangles to one square. (Thanks to John Golden
for this idea.)
There were streets, cats
Here's a slide show: