Stacking rings have an encouraging monkey that lights up and plays melodies and sing-along songs; base wobbles for added challenge and fun. Fun sounds and songs play when the baby rings are stacked discover numbers, colours, shapes and music. 14 colourful rings and a variety of textures promote tactile development and baby play; infant learning stacker is great for Baby learning toy is intended for babies and toddlers 6 months to 3 years of age. junior ring is an attractive educational toy which helps your baby recognize different colours and sizes while having fun stacking them in order. Basics Rock-a-Stack is a sorting, stacking and plugging toy for kids above 6 months and below 5 years. Bright colours, shiny reflections and swirling beads stimulate visual development. Helps baby learn to differentiate among colours and sizes of rings.