Make-A-Mouse is made by you for you. It is customizable to whatever size and shape you desire. We are ready and able to service your mouse comfort needs. The initial kit (bought in stores and on our website for $19.99) includes a base model, several starter pieces, the cords that you will need, and an instruction manual with how to plug in cords, along with some design ideas- but it doesn't stop there. There are two more options for ordering or buying pieces- Piece Packs and Collectible Packs. Piece Packs contain different utility pieces for $4.00 to $10.00 (depending on what Piece Packs you buy). Collectible Packs contain Collectible Pieces that cost $7.50 per pack. We additionally are dedicated to helping those diagnosed with a Carpal Tunnel, and will donate 10% of all our profit to the International Pain Foundation for Carpal Tunnel treatments.