[list][size=85][size=100][font=Arial][*]Require students to construct the objects.[br][/*][*]Can be constructed from scratch.[/*][*]Contain opportunities for discussion[/*][*]Encourage learning through investigation[/*][/font][/size][/size][/list][br][size=150]Examples:[br][url=https://tube.geogebra.org/material/show/id/811869]https://tube.geogebra.org/material/show/id/811869[/url][/size]