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🚂 Build memories, skills, and a greener future—one track at a time!
The Brio 33974 World-Smart Tech Sound-Action Tunnel Circle Set is a premium, battery-powered wooden train set designed for children aged 3 and up. Crafted from FSC certified wood and finished with a durable, non-toxic lacquer, it offers interactive sound and light features that respond to train speed. Compatible with all BRIO tracks and vehicles, this 14-piece set promotes creativity, spatial awareness, and fine motor skills while ensuring eco-friendly, safe play. Its compact design includes a storage box that doubles as a play mat, making it perfect for both home and travel.
| Number of Pieces | 14 |
| Item Weight | 796 Grams |
| Item Dimensions | 40.98 x 60 inches |
| Style Name | Child |
| Occasion Type | gift, Easter, Christmas, Holiday, Birthday |
| Collection Name | Toy Vehicles or Transportation Toys |
| Color | Natural Wood |
| Theme | Transportation |
| Frame Material | wood |
| Base | wooden |
| Material Type | Wood |
| Required Assembly | No |
| CPSIA Cautionary Statement | No Warning Applicable |
| Not for Kids | No |
| Number of Batteries | 2 AAA batteries required. |
| Compatibility Options | BRIO tracks and vehicles |
| Includes Rechargeable Battery | No |
| Rail Gauge | Standard Gauge (1,435 mm) |
| Number of Players | 1+ |
| Special Features | Portable |
| Includes Remote? | No |
| Skill Level | All |
| Is Electric | Yes |
| Power Source | Battery Powered |
| Battery Type | 2 AAA batteries required |
| Educational Objective | Spatial Awareness, Fine Motor Skills |
"**"
You don’t need to use the app
This is a really fun set my son loves it and you can program it with your own voice without using an app. It’s simple and fun.
R**E
Great Train Though Costly
We bought this train set for my 3 year old granddaughter and she loves it. We really need to expand the track as the track that comes with it is only enough to make a small circle. It is quality construction but still a small set for the price.
C**Y
Worth every penny
My grandson loves everything about these trains, I love that they are very affordable and durable, looks great and really neat features.
K**Y
Good Quality
Pretty cool durable train and tracks. Small but good for first time set
C**W
I ordered 2 and sent back 2
We have an extensive collection of Brio. I wanted to start my grandson on the smart pieces. This set was to be a second engine. Could not get either to work. I certainly know how to use batteries etc. I think the other battery was no good but couldn't get to it bc it was a triangle screw to open. Have no idea... even so, it shouldn't have been dead. Now I'm concerned about the smart collection all together.
K**T
Great buy for a smart train set
We looked at a few of the brio sets and saw that there were a few not so shining reviews of the smart tech sets but we’ve had a really good experience with them. Our son loves the option to use the app to control the trains or push a button to get this one to go after spending hours reconfiguring the train tracks.
L**N
Don’t buy 2021
Trains didn’t work in box. The wood tracks seemed flimsy. Please don’t buy, not worth the price at all. We ended up buying Thomas the train set and its 100% better than this purchase and cheaper.
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