These colourful 2d shape playdough mats are such fun for the kids and perfect for helping them learn about different shapes. You could laminate the whole set for repeat use.
Can the kids use playdough to draw a square using the line as a guideline, and decorate it too? Once they've tried this, they should feel confident enough to make a square shape by themselves too...
Here is a fun idea for learning about hexagons...make them with playdough! You can laminate the mat too so you can reuse it as many times as you like...