# ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit

Acrylic: ROKR Alchemy City MR04S-EU3 is a build-it-yourself plastic marble run with sound-responsive and marble-triggered lighting. It is designed as an interactive display, but the lights require a USB-C cable and plug that are not included.

- [Original product page](https://bargainpostbox.co.uk/product/rokr-alchemy-city-mr04s-eu3-marble-run)
- [View offer](https://bargainpostbox.co.uk/visit/rokr-alchemy-city-mr04s-eu3-marble-run)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: ROKR
- Model: MR04S-EU3
- Category: Toys & Games > Board Games & Puzzles
- Price: 49.25 GBP
- Previous price: 57.95 GBP
- Discount: 15%
- Price checked: 2026-11-12T19:23:43.077Z
- Rating: 4.6 / 5
- Reviews: 64

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Sound activation is described as running the marbles with light effects, with a separate view-only mode.
- Lighting effects are claimed to respond to marbles passing through sensor zones.
- The kit is described as connectable to other same-series models vertically and horizontally.

## Pros

- The combination of moving marbles and responsive lighting gives the finished build an interactive display feature.
- Modular connectors allow expansion with other same-series kits, according to the listing.

## Cons

- USB-C cable and plug needed for the light effects are not included, so buyers need a separate power supply.

## Specifications

### Identity
- Brand: ROKR
- Model: MR04S-EU3
### Dimensions and materials
- Dimensions listed: 18 x 7 x 23 centimetres
- Material listed: Acrylic

## Before you buy

- The listing gives two different size sets: 24 cm x 28.5 cm x 1.46 cm and 18 x 7 x 23 centimetres. It also describes the material as plastic in the title and Acrylic in the details. These specifications are inconsistent, so confirm the finished dimensions and material before buying.

## In the box

- Blocks (Included)

## A good fit for

- Adults who enjoy assembling a themed marble-run model and displaying it on a desk or shelf.
- Buyers interested in a build that can connect with other same-series kits.

## Less suited to

- Anyone who needs a complete powered setup straight from the box, since the USB-C cable and plug are not included.

## Customer feedback

The supplied evidence contains aggregate ratings but no customer comments. The distribution is mostly five-star, with a smaller spread across lower ratings. These figures indicate generally favourable ratings but do not explain individual experiences or establish specific strengths or faults.

## Frequently asked questions

### Does the kit include the power supply for the lights?
No. The listing says a USB-C cable and plug are required for the light effects and are not included.
### Can the model be expanded?
The listing says it can connect vertically and horizontally with other kits in the same series.
### What are the listed dimensions?
Two differing sets appear in the listing: 24 cm x 28.5 cm x 1.46 cm and 18 x 7 x 23 centimetres. Confirm the intended finished dimensions before purchase.
### What material is it made from?
The title calls it a plastic puzzle, while the details list Acrylic. The listing does not resolve this difference.

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## Add-ons

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## Images

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 1](https://bargainpostbox.co.uk/i/mFO93aunF0i9TOfdanv1Sw_a4ygpM4Yc4mUqc3gQUU5eyziVrkqAbi9DO-EnG2A5B8znm-9l1Ppw7HUZ-Q03IWHEcviz0A14S-Jz1S9WB6pINK1tz4NXYj67.jpg)

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 2](https://bargainpostbox.co.uk/i/47b85v5cQlYhHscPdyf4Q7S72EcA5EERNfOt0xtjtLDQiAjBSsbLqhneHGkcT80H4IBNB3GAJF4ecUkYo_gz0n6DOCFqrGkUqcXnAsRu2Bayk_O-isjqxZFH.jpg)

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 3](https://bargainpostbox.co.uk/i/WQnNPBDYD3qEZqLHmw4OF_lsmv_r8leaI-bIaTB7HllRhVU4nn9j-rlBVXFIYQ_pbPq-8NAybmA7T9HEB8E4Vb_WkR9zocsZ2qCI_Fz7cIm5zEV9BU0E9XXu.jpg)

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 4](https://bargainpostbox.co.uk/i/oSxnzxL_4ObHJ2zqOmvRSGH5vi8nYSTEOrI4qUkLLzXHwbBQcvwnQkO-boHLLld09Y71dsrqQuZSTh7rdvUPdniEJaueXzKseFOuwsB-4LhVB70TPqfW-lb0.jpg)

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 5](https://bargainpostbox.co.uk/i/V1vNRR8bbHTqWSTKEyxtd13gNZFWT2gyJeWiqfUhnk0xp-ctBXma11-CifLkcxa_oJ-cIYRoMX-QNtHOA_qBCisdj3XRs8lG7GJysccvqPGNdY-_kFRsVB21.jpg)

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 6](https://bargainpostbox.co.uk/i/GrtvXItYjp7kWEWUlwoYYJCGG8HSXb1hGaPahsLaxmuQm_6JDOJJyLdepF2m-LlLxOKTDUR5VrsA4GYDceoX90aY65Wp6iCpcfetN8bqIR35B2Fi6OSVYFDH.jpg)

![ROKR Alchemy City MR04S-EU3 Acrylic Marble Run Kit — 7](https://bargainpostbox.co.uk/i/BZFX_2VtGf-iVUNSrI4H67XYWG2MyNHXDSwdyHt5h2xHwKZZlZGocMbwLu6eOThXh9JA4NRr4R9d4LLMsfKIqUU-Z1XW603fN7FPu-Cz48DL1vMj8L-uzdKy.jpg)