Lumations branded led that use Twinkly app. Comes with 600 Rgb Led Christmas Lights at $199 from Costco.
I could see kids having lots of fun with these. At least that's what I'll tell my wife.
These are not the genuine twinkly branded lights. Twinkly branded 600 LEDs are $400 but still use the same app.
I don't know why these are so expensive other than the ability to change the leds patterns. Be aware if you setup on tree the lights will only fit on one side as you capture the extent of the leds by using the app with your camera. OPs price good, but product way overpriced.