These were our kids' favorite drawing "toy".  Tracing and out-lining the shapes for hours on end.  A favorite for years and years.   So much fun for kids of many ages.  It's also a puzzle;  the shapes fit in and out of the trays;  there are 3 trays with 6 shapes in each tray.  Each tray can be used to trace shapes.  It's just a timeless toy.   For ages 3 on up.