Kanga Care and Tetris have teamed up for an amazing print collaboration. The Limited Edition Tetris for Kanga Care collaboration "Block Party" is a celebration of 35 years of Tetris! Kanga Care and Tetris have teamed up for an amazing print collaboration. The Limited Edition Tetris for Kanga Care collaboration "Block Party" is a celebration of 35 years of Tetris! Soft, lightweight and breathable 100% Viscose from Bamboo muslin fiber lends itself to becoming the perfect swaddle blanket for your sweet baby, toddler, or yourself! Grab this soft swaddle for nap, bedtime, cuddle time, burp cloth, nursing cover, stroller cover... the uses are endless. Kanga Care Serene Swaddles and Blankets become softer and softer with each wash.