The Flip is a lot of fun to watch. I think it was probably my favorite of all the GraviTrax expansions so far. The marbles are made of metal and are decently heavy for their size, so they roll really well and keep their momentum. You can design your setup to make marbles go up, down, whip around corners, or whoosh down vortices. Planning is half the fun with this set, as is swapping out pieces and trying new combinations to create thrilling and sometimes-unpredictable runs. The base tiles have some hexes marked in green, making it easier to correctly place pieces according to the included plans. The base tiles being cardboard, though, means that they could easily wear out with a lot of play, with the constant insertion/removal of pillars and tiles. They’re sturdy cardboard, but they are still cardboard. If you’re using GraviTrax on the floor, stepping on it wrong might bend or dent the base tiles, too, making them less useful.

If you’re new to GraviTrax or GraviTrax PRO, I recommend working your way through the configurations in the included booklet before going out on your own. There is one easy setup, one medium setup, and three hard setups. Working your way through these acts as a tutorial, teaching you how all the pieces work and what their capabilities and limits are. My almost-20-year-old daughter, ever the inventor, of course, improved upon some of the base projects. Don’t be afraid to experiment, even with the included projects! They are a perfect departure point for designing your own setups. The Lifter expansion, as might be obvious from the name, lifts marbles vertically to three different levels depending on how many pieces you use to build it. It needs to be manually operated each time by a button and can send marbles in different directions at the top. What’s in the Box? I was surprised with the consistency here, simply because of how energetic this expansion is. I expected the marbles to go flying off all over the place, but they went where they were supposed to the vast majority of the time. It’s fun but too inconsistent. You’ll be better off with something else unless you’re looking to complete the set. This GraviTrax expansion also has by far the least amount of stuff in the box with no bonus parts beyond the trampoline itself. To start, a little bit of assembly is required. Hexes need to be punched out of the four base plates (tip: save these to be used as game pieces for other games you play!), and the pillars and balconies need to be assembled—this is pretty easy as everything is marked with letters and there are instructions in the booklet. Once those are set up, though, you won’t need to do it again.Tl;dr: All in all, GraviTrax and GraviTrax PRO are incredibly fun marble run sets for STEM-minded kids and adults. This set includes 2x Sets of Instructions, 4x Card Bases, 1x Transparent levels, 6x Gravity Spheres, 3x Long Rails, 6x Medium Rails, 9x Short Rails, 1x Magnetic Cannon, 28x Curved Bases, 4x X intersection Bases, 1x Vortex Base, 2x Y Points Bases, 1x End target, 1x 3in1 Base, 4x Bases for inserts, 1x 3 Way Starter Base Insert, 2x Catcher Base Inserts, 2x Switches, 1x Base Insert, 1x Free Fall Base Insert, 20x Large Vertical Tiles, 9x Small Vertical Tiles, 8x Pillars, 4x Tunnel Pillars,2x Walls Long, 3x Walls Medium, 1x Wall Small, 16x Balconies, 4x Double Balconies. Article number: Lasting durability for girls and boys ages 8 and up, it’s the learning toy children (and savvy adults) return to over and over again!

As it simply carries a marble along in the same direction it came from with no level shifts, this is one of the easiest GraviTrax expansions to incorporate. The GraviTrax sets are designed for anyone aged 8 and up (though I might recommend 10 and up for the GraviTrax PRO) and are perfect for solo, group, or family play. They are sophisticated enough to be fun for adults on their own, as well. Consistency: How consistently did each expansion do what it was supposed to do? For this, we used each piece 10 times in an identical setup and recorded how often it worked correctly.The Scoop expansion scoops the ball up and flips it over to the next section, carrying on in the same direction. What’s in the Box? Test your creative limits and the laws of physics with the “GraviTrax PRO Extreme Starter-Set”! Vertical components and four action accessories from the PRO series (Splitter, Mixer, Turntable, Helix) combine to create more challenges, more possibilities, and more extreme fun! Set up’s a snap as children explore STEM concepts while engaging in independent, creative play. Simply add more accessories for endless possibilities to experience the power of gravity and educational fun today! The one expansion I would advise avoiding is the Trampoline. Scoring just 18/40 in our challenge, it was inconsistent, hard to use, and included the least amount of bonus pieces which made it poor value for money. While it looks cool and is probably the most fun to watch when it actually works, it’s just not worth your money in my opinion unless you’re looking for a complete set of all the expansions. My son really loves using the Lifter, which surprised me somewhat as I thought he would be annoyed at having to manually operate it each time. He enjoys seeing how the lifting mechanism works. The fact that 1/3 of the pillars don’t have a tunnel through them seems like a missed opportunity. There is no disadvantage to having a tunnel through a pillar, and having some without a tunnel limits your options.

Ravensburger sent my ten-year-old son and me six of the latest GraviTrax expansions to try out. We rated them over four different features as follows:The walls have so many locations to place balconies that people who love to design and experiment with different configurations will have so much fun. Those who prefer to follow building instructions will need to be creative to make use of their options, but at least they can use the included designs to use as a starting point. The instructions for the included projects are pretty clear, but for some of the more involved setups, it can be difficult to tell where to attach the balconies, since they are transparent and harder to see on the busy diagrams.