Water Wigglies make great stress relievers because they're fun to fidget with and hard to hold as it's slippery.there are different style of water wigglies.Pearl Water wigglies,the additive to the water inside gives these a pearlized look.when you touch or squeeze them,swirling cloud pattern are sent throughout the water wiggly.just like a chameleon!squeeze the water wiggly and watch it change color!Awesome tactile fun!or you can fill it with opaque water,sea creature & glitter.what a combination!Try to hold on as you squeeze and watch the sea creature swim through glitter.