Pentominoes-exploring with 5 Congruent Squares

Pentominoes, once found, can be used for all sorts of explorations from tiling a space to deciding which ones will fold up to making an Open Box (a cube with out the lid!)

Start with having 5 squares about 2cm a side made out of cardboard(easier to use than paper ones) or plastic squares from Lego or Duplo.

The rule is that each full side of a square must attach to another full side.  No half to half!

Enjoy the exploring and creativity.

(I would love to hear about some of your creations with using Pentominoes along with Justifications about the number of Pentominoes you found)