Pythagoras Series Pythagoras Cube, what is this? 20-piece set - Target age: 1.5 years old and up Thank you for viewing. This is a basic 20-piece set that allows children from 1.5 years old to "play," "create," and "develop inspiration" through various forms of creative play. It has a non-repulsive rotating mechanism that allows it to stick in any direction. Alcohol-sterilized. There are no noticeable scratches or stains, but there are small scratches as it has been played with many times. Please understand that this is a used item and purchase accordingly. The outer box and blister tray have been discarded, but it will be carefully packaged. It will be shipped via Yu-Packet Plus from the post office.