My son is getting into Technic, but it's been about 40 years since I've been out of it. He wants to motorize his sets, so #88013 is obvious. What about #88021 and #88015? What's the difference for one battery pack over the other? He's also saying the hub #88012 is needed nowadays. Reviews are saying to get the "buggy" or the "rally car." Which sets are these and do they still have the hub? Is the hub worth it? What's it do? submitted by /u/RoryDragonsbane [link] [comments]
