Learning Resources Alphabet BubbleBrix. Alphabet BubbleBrix is the multisensory fidget tool that builds literacy skills through tactile, hands-on learning. Press a letter brick, feel and hear it pop, and practise its name and sound. Interlock the bricks to build simple words, and practise reading and spelling. Includes 42 Alphabet BubbleBrix in a storage bucket with convenient carry handle. Features multilingual Activity Guide and packaging. (Ages 3+)