Learning Resources Numberblocks 4 & Terrible Twos FiguresNumberblock Four is a sturdy squareuntil he splits into the Terrible Twos, who always have a trick up their sleeves! Fans will enjoy re creating one of their favorite episodes or inventing their own mischief. These figures are made of durable plastic and have posable arms. Each set includes a Numberblock Four Figure and two Terrible Two figurines. Figures are proportional and work with all of our other Numberblocks figure sets. Collect all the fun