This Space Alien loose part pack is the perfect addition to various types of sensory play or other crafts and uses. We use our acrylic pieces with play dough, water, rice/pasta sensory mixes or even on there own. There are two options for this set - Glow in the Dark and Pastel Purple The Glow in the Dark loose parts show in a orange & yellow in the light and change to neon pink and yellow/green in the dark. This set comes with 6 Alien pieces as shown in picture, in a drawstring bag. Pieces are about 2.5" dimensions. These pieces are made from 3mm cast acrylic, with a laser cnc cutting machine.