SmartMax My First Sounds and SensesMagnets, sounds and senses! Shake, rattle and build! Amaze your little one with our brand new My First Sounds & Senses set. The pieces have different textures for a tactile experience, different sounds for an auditory experience, and different faces for recognizing emotions. Children can assemble the rattles by matching the colors. The yellow rod with the yellow ball. But in fact all the balls and rods can be mixed. It's up to them to choose!