Make a cube out of straws and have a go at this practical
Reasoning about the number of matches needed to build squares that
share their sides.
How can the same pieces of the tangram make this bowl before and after it was chipped? Use the interactivity to try and work out what is going on!
If you are having trouble with the visualisation and you don't have left-handed and right-handed dice, you could stick spots onto cubes to help.
Alternatively, print off this sheet which has a net of a right-hand dice on the first page and a net of a left-handed dice on the second.