Create your own liquid wand pen hat lights up when you write! Everything you need is included to create a mini ocean habitat with a “swimming” Pen Pal character inside! Watch this full color highly detailed adorable character sink to the bottom and then float back up to the top. Assembly is easy and fun. The package doubles as an activity center holding the pen securely so you can have your hands free to add the plastic bubbles, swirly beads, Pen Pal , plastic accessory and mineral oil.