Naef Cubics (Red) With acrylic case I bought this as a toy for my child. After they stopped playing with it, I displayed it in an acrylic case. It's stylish and can also be used as interior decoration. All the parts are present, but there is no box or instruction manual. Designed by Peer Clasen and released in 1968, this is the "Cubics" building block, a representative product of the Swiss company Naef (Naef Spiel). "Cubics" has beautiful gradation colors and allows for various combinations. It is structured by dividing a 10cm cube into 10 pieces of 4 different sizes.