Number Bubblebrix Is The Multisensory Bubble Popper Fidget Toy That Helps Children Build Early Maths Skills Through Tactile, Hands-On Learning. Press A Number Brick, Feel, And Hear It Pop, And Say The Number. Interlock The Bricks To Create A Number Sentence. Includes 42 Number Bubblebrix In A Storage Bucket With Convenient Carry Handle.