Review: Scooby-Doo! Mystery Mansion 
Set Theme: Scooby-Doo! | Set Name: Mystery Mansion | Set Number: 75904-1 | Piece Count: 860 | Number of Minifigs: 6 | Set Year: 2015
Mystery Mansion from the LEGO Scooby-Doo! theme is not only the largest set of the theme, but it’s also the best. The set clocks in at 855 pieces and includes a ton of play-features, including the majority of the Mystery Inc. gang represented in minifigs and some wonderfully spooky scenes for them to frightfully explore.
The build of this set is incredibly fun. There are a number of unique building techniques used with this set in order to achieve the lopsided, dilapidated look of the mansion, helping to establish the mansion as a comically eerie place to visit. Adding the vines and the various plant-overgrowth elements to the set is also a ton of fun and really enhances the display value of the overall set.
The only downside to the build [and to the set as a whole] is the stickers which you need to apply to a number of the mansion’s windows. Any somewhat-experienced LEGO builder will understand how difficult it can be to apply a sticker to a clear brick. Even if you’re careful and apply the sticker perfectly, it can still leave little bubbles and slightly devalue the overall presentation of the set. Still, there’s an easy solution to this issue - simply don’t apply the stickers. I can confirm that even without the window stickers applied, the set looks great. I opted to apply some but not all of the window stickers. For example, I opted to not apply a couple of the window stickers meant for the greenhouse area of the mansion which included two cartoon-esque venus flytraps. I felt it made the set appear a bit cheap, so I excluded these two stickers from the build.
THE PLAY FEATURES
The play features of this set are plentiful and really make this a fantastic set for children, regardless of whether or not they are fans of Scooby-Doo. The play features include a large, chomping venus flytrap or “man eating plant” [which is a separate build], a spiky pendulum waiting to be used on any intruders coming through the front door, a loose floor plank in the front entrance under which houses a mysterious golden key, a turnable clock which reveals a vampire as the clock approaches midnight, a locked safe in which contains three gold bars, and a filthy, bug-ridden kitchen which includes [of course] a hamburger for Scoobs. All of the play features work great and are very easy to use/manipulate.
The minifigs and motorbike included in the set really solidify this set as being a great value. LEGO has done a wonderful job bringing the iconic cast of the Scooby-Doo series to the minifig universe. The only exclusion which I wish had been included in this set is Fred. He’s the only member of the Mystery Inc. gang missing from this set. [Still, you can always pick up The Mystery Machine set [75902-1] if you’re intent on napping a minifig Fred]. In addition to Velma, Daphne, Shaggy, and Scooby-Doo, you also get Bluestone the Great from the episode “Hassle in the Castle” disguised as a spooky ghost with a ball and chain, Bob Oakley from the episode “A Gaggle of Galloping Ghosts” disguised as a vampire, and the seemingly harmless Mr. Wickles from the episode “What a Night for a Knight” disguised as a, you guessed it, a black knight. Each minifig [with the exception of Scooby-Doo] come with an alternate face.
The inclusion of the motorbike is an unnecessary but great addition to the set and the set’s play value. With the sidecar attached, this little bike is capable of accompanying two minifigs. The motorbike is highly vroom-able and makes for a great potential get-away vehicle for two frightened minifigs.
This is a great set. The unique building techniques make for a great build, and the wonderful details [despite the sticker-on-clear-bricks issue] make this a great set to display. What really makes this a great set though are the play features. The inclusion of so many great play features, minifigs, and the extra bonus of the motorbike make this a really fun set for fans of Scooby-Doo or children wanting to go on their own Mystery Inc. adventure.
Playability: A+ | Displayability: B