The Aquadoodle pen is a writing instrument which is contained in an Aquadoodle kit or can be purchased separately and is primarily used by preschool aged children. Aquadoodles are an extremely popular children's activity toy mainly due to the fact that they use a patented technology which utilizes "hydrochromatic" ink that is activated by water, is non-toxic, and virtually mess-free.

Aquadoodle toys became available to consumers in the year of 2003 and quickly became a favorite among parents of preschool aged children-winning many awards- and became the number one selling activity toy for preschool aged children.

There are many different Aquadoodle kits which contain the Aquadoodle pen and many also have an Aquadoodle brush which uses the same technology. There are Aquadoodle mats which can be used on the floor and ones that are specially made for hanging on walls.

These creativity kits also come in a compact travel form which is great for keeping small children occupied while on the road without having to worry about a messy clean up. You can purchase these kits or the Aquadoodle pen and brush separately through most major retail and online stores such as Amazon.com who carries a large selection of Aquadoodle products.