A cube net is the flat fold-out template of a cube.
A cube has six faces. So the net needs exactly six squares, one per cube face.
Count the squares first: if there are only five squares, or seven, no cube can be made. Check No.
If the template has exactly six squares, imagine folding it into a cube, and check Yes.
Example
For parents
What does this exercise practice?
This task combines counting with first spatial thinking: children learn that a cube has six faces and check by counting whether a template can become a cube at all. This prepares for the cube nets of the higher grades.
Common pitfalls
Many children want to fold right away instead of counting first. The rule of thumb helps: without exactly six squares it can never become a cube. Count first, then decide.
How to practice at home
Cut out a cube net from paper and fold it together into a cube. Try different arrangements - which ones close up, which do not? That makes the idea easy to grasp.
Related: wuerfelzaehlen, Match dice, Shapes