children drawing rulers with

ancient childhood circle class color colorful corkscrew cute drawing education educational equipment five fun gear geometry green hackly helix hexagon interesting isolated kid kids learn lines nobody numbers object oblong old oval pencil pink plastic polygon preschool rack red retro ruler rulers school serration set shape shapes smile spin spiral square star stationery student thing time tool toothed toothing toy toys traditional triangle triangulum trigon trilateral used vrille wheel wook zero zigzag