Create your own liquid wand pen that lights up when you write! Everything you need is included to create a mini ocean habitat with a "swimming" Pen Pal character! Watch the adorable character sink to the bottom and then float back to the top. Assembly is easy and fun. • "This clever collectible activity allows you to make your very own light-up liquid wand pen! • Add Pen Pal microbeads plastic "bubbles" clear accessory and mineral oil to create your habitat! • Watch the Pen Pal swim up the pen as the other elements cascade to the bottom! • Pen lights up when you press to write! You will want to collect all 4 styles!