8 Colourful metal bars with matching coloured plastic resonator tubes that share the same colour template as the Boomwhackers tuned percussion tubes. Line Bells up to play solo, or separate them for use with small groups. The set is flexible enough to be used in classrooms as an educational tool, or at home for the sheer fun of making music! Comes in a convenient, durable carrying case and 4 pairs of mallets for multiple players. Age 3+.