These are really cute and fun for kids! We own four total! They were on special last Christmas 2013 from QVC - grandma purchase. They were fun for my older elementary aged kids for a week. My 3 year old played with them for months, dancing and carrying them around. You have to plug it into your iPhone or iPad, turn on music from your device for it to dance. I think one is enough per family. Overall it's a fun gift that dances to music from your iPhone!
My daughter loves using this when she plays her music over and over. SHe loves to dance and having this speaker cat dance with her it's hilarious to watch. Not great sound quality but fun concept for kids.