Little Ones Can Stack Up Some Fun With The Fisher-Price Stacking Action Blocks .Each Block Has 4 Sides Of Play Featuring Abcs, 123S, Peek-A-Boo Play And Fun Action Play .Red Black Features A Spinning Wheel With Rattle Beads Inside And A Toggle Switch .Blue Block Features A Rolling Drum And A Sliding Door .Yellow Block Features A Clicking Dial And A Flip Door .Press The Button On Each Of The Blocks Or Stack Them On Top Of One Another To Activate Fun Actions .Helps Stimulate Baby'S Senses And Develops Fine Motor Skills An Hand-Eye Coordination .Suitable For Children Ages 6 Months To 3 Years .