Make Merry Music. Sing and Dance with this Musical Piano Touch Mat. It measures 100" Wide, 36" Deep AND 1/4" Thick. It is for kids ages 3 and up but age has no bar for some of us who refuse to grow up when they see the Giant Piano Mat. This soft keyboard features 25 large and touch-sensitive keys for hours of musical fun, where you can make music together with your family. Gather few tiny tots together to sing and dance along with you and have hours of musical fun time stamping and running over