# Tsomtto 18 in 1 STEM Toys Building Set, 175 Pieces, Pull-Back Cars

Tsomtto’s 175-piece STEM building set creates 18 models, including pull-back cars, for hands-on indoor building and play.

- [Original product page](https://www.ofertitastop.com/us/product/tsomtto-18-in-stem-toys-building)
- [View offer](https://www.ofertitastop.com/us/visit/tsomtto-18-in-stem-toys-building)
- Market: US
- Language: en-US
- Currency: USD
- Product updated: 2026-10-17T12:50:40.576Z
- Brand: Tsomtto
- Model: 18 in 1 STEM Toys
- MPN: J-7761
- SKU: ofertitastop-us-139019
- Category: Toys & Games > Toys > Building Toys > Construction Set Toys
- Source store: amazon US
- Active deal: Yes
- Price: 34.19 USD
- Previous price: 37.99 USD
- Discount: 10%
- Rating: 4.6 / 5
- Reviews: 170

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

## Description

This 175-piece plastic STEM building set lets kids assemble a choice of 18 models, including a forklift, rocket car, plane, racing car, and UTV. A step-by-step booklet guides each build, while the colorful pieces make it easier to sort and find parts as children work through a design.

The set combines hands-on construction with pull-back play. Kids can follow the booklet or use the pieces for their own creations, and the five difficulty levels offer different challenges for a range of ages.

## Getting the most from it
Choose one model from the guide and build it together, using the steps to identify parts and plan how they fit. The set makes a practical activity for a rainy afternoon, indoor play, or a shared project with a parent or friend. Once assembled, car designs can bring the build into play with the pull-back friction feature. The set makes one model at a time, so take the finished design apart before starting another from the 18-model lineup.

The booklet supports a more guided experience, while open-ended building gives children room to experiment with different structures. Working through the assembly can encourage creative thinking, problem solving, and hand-eye coordination. Buyers describe the building and play as engaging for children’s exploration and creativity, feedback on assembly is mixed, with some noting that the directions are clear and easy to follow.

## Where it shines
This is a building kit with play built into the finished designs, rather than a single ready-made car. That makes it well suited to children who enjoy both putting pieces together and using what they build afterward. Model choices range from vehicles such as a forklift and UTV to a plane and rocket car, giving kids different shapes and ideas to explore within one set.

For a family activity, an adult can help read the guide while children locate and connect the pieces. For independent play, kids can pick a model and work through its steps at their own pace. Its portable format and storage box also support tidying the pieces away between builds.

## Quick overview
- Pieces: 175
- Build options: 18 models, one model at a time
- Material: Plastic
- Play feature: Pull-back friction power
- Recommended age: 36 months to 8 years
- Included: Construction toys and guide booklet

## Questions before you buy
**How many designs can kids build?** The set offers 18 model options, including a forklift, several types of cars, a plane, and a rocket car. The pieces are used for one model at a time.

**Does the set include instructions?** Yes. A step-by-step guide booklet helps children follow the assembly process and choose from the model options.

**What kind of play does it support?** Children can build and rebuild models, then play with car designs using the pull-back friction feature. The set is intended for indoor use and is designed for children ages 36 months to 8 years.

## Final verdict
For children who like making things as much as playing with them, this Tsomtto set brings 18 guided builds together with pull-back car play. Its range of models, booklet, and 175 pieces make it a fitting choice for hands-on indoor activities and shared building time.

## Images

![Tsomtto 18 in 1 STEM Toys Building Set, 175 Pieces, Pull-Back Cars — 1](https://www.ofertitastop.com/i/FiFzqi29t01sLaZKmlDbgbhp2CWTMas-AtetY0MmuL7fXzfTL8OLRS10-vdySW4rD3ij3G8CORf4Lluo1_ot2NbeWN4i-m0Mnwl1DSLf7m6wIez638Ck5jjKwQ.jpg)

![Tsomtto 18 in 1 STEM Toys Building Set, 175 Pieces, Pull-Back Cars — 2](https://www.ofertitastop.com/i/bLqi5d7emt_Kw9vMagUlMGlGmduIA4r-n9ac7ehyo-bHSSG3upQ9qriujyVfhCFC86-noE5Z5OEducc3AKhxLIsLisQDtWVehpxFhdTcTYmnEfKpzM8DOyD56Q.jpg)

![Tsomtto 18 in 1 STEM Toys Building Set, 175 Pieces, Pull-Back Cars — 3](https://www.ofertitastop.com/i/1Nf4KAfPn8DKcpWTMjixazPBELf2ODHXBq8DHZ_1yMxWuJ58m0PC6bCUE7ARevIaYsoHVfd3BlmigmkkMdRNsrVvtAgmfUPC_Cj2JOhpLLHDNPNO9aQD2qlaNw.jpg)

![Tsomtto 18 in 1 STEM Toys Building Set, 175 Pieces, Pull-Back Cars — 4](https://www.ofertitastop.com/i/BVs1BJgMLyetfAp02FNdIza7oC-ikU5zx4nZ2PskikLrcNwlihTz8ZxtX0477UZtGUDgsm8o84t6J02cikm5Xa4zQj4aBhbP78ieFQM3hkpyelRpVc20JxDYxg.jpg)

![Tsomtto 18 in 1 STEM Toys Building Set, 175 Pieces, Pull-Back Cars — 5](https://www.ofertitastop.com/i/igb03d-2NOhaGRD6rOtdwHeQJukO3RPado6erKNbjP0ccTHIW7D2Tbck3NqzuYEVUz1u45dHNFjVzy2n4qM71OlZiKNoEU1Qn3UVhyWm_HYPBLWrxlX-XB_MRw.jpg)