There are four figures on this toy that pop up and sing a little song when a button or switch is activated. Each button works differently. Oscar is a dial, Cookie Monster is a button, Elmo is a sliding switch, and Ernie's switch is like a light switch. The characters and the songs they sing are recognizable to little ones that watch Sesame Street.
My daughter received this toy for her first birthday. She could only work two of the buttons at first, but it was fun to watch her learn to do the other two over time.
The two complaints I have is that 1) there really isn't much to this toy, so after mastering the buttons and switches the have outgrown it, and 2) the volume is way too loud (we covered it with duct tape, which helped).