Sing your heart out with the dreamworks trolls sing-along boombox the dreamworks TR-115EM trolls sing-along boombox will have your child singing with joy. This boombox is loaded with built-in music which you can sing along to. You can also plug in your MP3 player and perform from your own playlist using the real working mic. This set also plays back lines from the movie trolls and a comes with a storage compartment at the back for your MP3 player. Watch your child sing and sing along yourself with this trolls boombox.