Help toddlers develop their sensory skills with the Plan Toys Sensory Blocks. In a pack of six, each block has its own unique feature relating to sound, sight and texture. Watch them gaze into the mirror, make sense of the fractured prism or touch the textured corduroy. They’ll also love shaking the sound block too. And if this wasn’t enough, these blocks are also great for stacking - and, well, knocking down too. All PlanToys® are made from non-toxic, natural materials such as organic rubberwood.