Each case contains 3 Dream Star Pens & 3 All Sport Pens. The only pen you connect and build. Mix and match the colorful beads elements to create fun, new designs every time you write. The pens include: a create your own pen, bead elements, and extra 3 piece Minifigure bead element. The pen has a soft grip and uses a replaceable ink cartridge. Just turn the ring to write. The bead elements are round and square. The bead elements are interchangeable with bead elements from other Lego pens.