There have been robot builds. There have been truck builds. But the LEGO designers delivered something truly special with this: a massive Transformers Optimus Prime that also turns into a semi truck.

LEGO has focused more on the 18+ age range in recent years, releasing plenty of LEGO sets for adults. One of the ways this manifests is in sets that play to adults’ nostalgia for when they were kids.

Lego's third Transformers buildable figure is now available for Lego Insiders. The 1,505-piece model of the Decepticon Soundwave costs $190 and is a timed-exclusive on the Lego Store. Lego Insiders is ...