Marble Kit V

This modular marble set was created mainly to have a small marble run on the desk and distract for a while to set up the circuit and throw the marbles.

I have spent more than five years modifying this project to create the perfect circuit and looking for the best way to join the pieces together and make it easy to print.

The pieces are printed in PLA with 0.2mm. No supports are needed, they are already included in the model.

Updates

Updated V.7 (11/10/2025)

New set: Acrobatic set

Marble

The circuit is designed for marbles of 11mm diameter. I usually use metallic marbles, their weight allows the marble to go faster.

Jointing system

The pieces are joined together in two ways: sideways to make the circuit and vertically, so that the circuit can grow upwards.

Sets

Elevator set

https://www.printables.com/model/1413150-marble-kit-v-elevator-set

Structure set

https://www.printables.com/model/1420801-marble-kit-v-structure-set

Acrobatic set

https://www.printables.com/model/1442152-marble-kit-v-acrobatic-set

In this section I will put the new pieces by sets. I do it this way to be able to organize the pieces in a better way and to know which pieces the users like more and thus to be able to know which pieces to create before.

More parts coming soon

Parts

Goal

Final element of the circuit. This is where the circuit should end and where the user will pick up the marble. Up to three marbles can fit.

Straight ramp

Allows to lower the level of the circuit and makes the marble increase the speed. It measures two in height.

Structure

Allows the creation of towers to support the circuit. I recommend printing many pieces of this, when the circuit starts to grow vertically, more pieces are needed to support.

Straight

Single piece to make the marble go straight.

Start

Initial piece. It is where the user throws the marble to start the circuit.

Curve

Simple piece that allows to go to one side.

Left curve ramp

Left turn ramp.

Right curve ramp

Right turn ramp.

zigzag ramp

2x1 ramp where the marble follows a zigzag path.

8 ramp

2x1 ramp in the shape of an eight. At the start, the marble will go down one of the two paths on the ramp. The marble slows down after passing through the ramp.

Elevation ramp

2x1 ramp where the marble picks up speed to climb an elevation on the ramp itself.

Tornado

3x3 piece where the marble will spin around until it falls through the hole in approximately 5 seconds.

Structure curve

Curve that allows a route to pass directly underneath the piece.

Structure straight

Straight that allows a route to pass directly underneath the piece.

Big curve ramp

Helix curve 

Ramp with a propeller that moves when the marble passes over it. The pieces are press-fit together.

swing

When the marble moves slowly, it will fall automatically, but if it moves quickly, the marble will return to the floor where it was.

Curve cross

Two curves on the same piece without touching each other.

Connection curve

Ramp connecting two circuits into one.

Straight cross

two straight lines that intersect each other. This piece can cause blockages in the circuit.

Divisor

Divide the circuit into two. The marbles will go through one circuit or the other alternately.

2x2 Goal

It has a capacity for 16 marbles.

Helix ramp

When the marbles go down the ramp, it makes the helix move.