There was time for this

I pondered whether to do it, and decided Yes! We did make a start on our popup cuboids. We made the cubes.

 

 I decided that as there was a fair bit of arithmetic in it too, it covered a lot of bases. Working out the surface area, and the volume, usually involved a one digit X two digit calculation, and it was a chance to remind about grid multiplication in a context.

They would make a good book! I would also really like to make to get the class struggling with making non-cube cuboid popups. Doing this involves getting to grips with how a cuboid works (opposite faces being the same).

The children who finished quickly I steered towards making some cuboid pictures with pattern blocks:

This is something I'll maybe do more systematically next year (if I'm teaching around this age).