Yes, even Mattel got in on the portable drum craze. I've never seen these before but if you haven't messed around with electronic drums, they are a riot. I run mine through my keyboard amp and they sound pretty good. Mattel had all of those great hand-held games in the late 70's, football was king but hockey and racing were pretty entertaining as well.
I don't remember anything electronic but the hand-held LCDs from Mattel, the organ is cool, they kind of pre-date the portable keyboard revolution of the 80's. I remember every gray-hair having one of those cheap plastic "organs" at their home so they could sound like they were at church, the Yamaha's and Casio's came out and changed all of that thankfully.