This is a fun writing and creative toy that will encourage your child's skill and mastery. It is easy to put together. Just take the pen color of your choice and insert the pen through the bottom of the top. Now hold the top by its spinner (the top part of the pen), place the top on (not over) a piece of paper and spin. To avoid messy out-of-control spin-always, put your paper flat inside a box or in a confined area before you spin. There are number of different things you can do to create exciting patterns. It is a lot of fun and helps to improve fine motor skills while encouraging imagination. The single pack comes with one top and one pen. It comes in five different colors. Refill pens are sold separately.