Octa Cube Activity Cube - Multicolor4463 Octa Cube Activity Cube Multicolor. Description : This is better than a simple baby block set or simple crawling toys, this toy activity cube. This cube features 6 different sides assemble and interact with, each with your own learning based activity. This cube has 6 sides all side are have different color and sides are detachable and can be easily arranged. Build Learning Skills: There is so much for toddlers do with this baby sensory toy set.