Here are some of year 4’s fantastic area people built out of Post-It Notes.
They built them from a specification, each body part had to be a specific area.
Earlier this week building rectilinear and composite shapes with a given area using the Area Builder PHET website.
Have a go at home, it’s free!
https://phet.colorado.edu/sims/html/area-builder/latest/area-builder_en.html