Quilt blocks from a garage sale

For clarification, yes, fabric arranged into a unit are often called quilt blocks. What I mean is real wooden blocks. What do you see when you look in this box?

Do you see quares, half-square triangles (or right-angled triangle for you non-quilters) and 45-degree diamonds (or rhombus for my mathematically-inclined relatives)?

What did I see when I looked in the box? (Hint: what can you make with squares, half-square triangles and 45-degree diamonds?)

A quilt!

And my niece and nephew can play with them when they come to visit. It seems only fair since I played with their blocks the last time I visited them.