Summary: built in speaker, 2 headphone ports, and removable sd card that mom can easily transfer music to. my kids get a kick out of the "shake" feature. no problem with batteries lasting long. my kids have had this for 3-4 years and it's still going strong.
Summary: I thought this would be a fun item for my four-year-old. However, we had problems! First of all, the shaker did not work (which was the whole gimmick), it is not rechargeable, and the volume and song dial are difficult; if you turn the dial just a little too much (very sensitive) you remove the top where the memory card goes. UGH! Sandisk should have let Mom's design this.