U-Build Its Construction and Pattern Blocks from BeginAgain are colorful U-shaped blocks that make building easy for toddlers! Made from rubberwood, these colorful, chunky blocks can quickly stack into towers, buildings, and patterns with ease. Our U-Universal U-shaped block offers toddlers open-ended construction play without frustration, and the wooden storage box makes clean up and storage easy! Perfect for ages 2 and up. Using sustainably harvested materials, BeginAgain works to benefit our kids and our environment.