• 8 translucent pieces to enhance the playability of your existing marble run.
  • 2 swings & 2 catches that move the marbles through the air.
  • 2 jumps & 2 catches that can be made simple or extreme to create fun challenges.
  • Compatible with Marbulous Marble Run Toys including our Marble Genius Marble Run Starter Set (60 pc.), Super Set (85 pc.), Extreme Set (125 pc.), & 8 Accessory Sets
  • Standard toy size marbles (5/8 inch or smaller) work with this set (no marbles included with this set).

Bought this, along with the Starter Set, the Super Set, and several sets of accessories, for myself. Yes, I'm an adult. Yes, this thing is fun! Everything in this booster set works as described. There are no instructions, so it took a few minutes to figure out the swings, but once they're up and running, they're awesome! The marbles almost never miss the catch basin. Pretty cool!

Nice addition to the set

I love these! They are some of the most interesting pieces you can have in a marble run. Jumps and Swings? I would encourage you to put a splitter piece before a "swing" though because they can get overloaded if a ton of marbles come at it all at once and some will fall out of the track.

Excellent set of add on accessories for Marble Genius. My son loves it.

We ordered extra parts for our full set. The kids love to build and race their marbles.

Great addition to our marble run. These parts made it more exciting. Easy enough my 4 and 6 year old could handle it.

My kids love to be able to make jumps and these do the trick.

So much fun for young and old!

We love the jumps and all the extra fun pieces! Will be purchasing more, we hope you continue making more kinds of extra fun pieces for our marble runs!!