Pay in installments of $22.50 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 21 - Jul 26
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Smithsonian DIY L4 4 Cylinder Inline 4 Car Engine Assembly Model Kit STEM Science Toy BlueSmithsonian DIY L4 4 Cylinder Inline 4 Car Engine Assembly Model Kit STEM Science Toy BlueFeatures:. Build your own car engine with a number of parts, which will be unprecedented stimulation and challenge. Switch on the assembled engine and the engine will turn. The valve opens and closes, the spark plug lights up, the piston drives the crankshaft, and the fan structure rotates. The dynamic components in this kit make the experiment real and
Smithsonian DIY L4 4 Cylinder Inline 4 Car Engine Assembly Model Kit STEM Science Toy BlueFeatures:
.Build your own car engine with a number of parts, which will be unprecedented stimulation and challenge
.Switch on the assembled engine and the engine will turn. The valve opens and closes, the spark plug lights up, the piston drives the crankshaft, and the fan structure rotates. The dynamic components in this kit make the experiment real and interesting
.Transparent shell design for observing and understanding the working process of the engine. The basic principle of a four-cylinder engine is that converting thermal energy of gasoline (diesel) into mechanical energy by pushing the piston to do work when the gas in the sealed cylinder expands.
.A great STEAM science toy to Develop children's mental thinking, and develop innovative thinking ability. Adults can collaborate with children to enhance parent-child interaction. DIY assembly toy can cultivate children's hands-on ability
.It comes with clear instructions to guide children to gradually understand the structure of the engine and related mechanical knowledge. In the experiment, help the children learn the operating principle of the engine and understand the process of energy conversion. From small parts to complete finished products assembly process, exercise children's logical thinking, cultivate children's creativity and self-confidence.
.For over 8-year-old.
Specifications:
.Color: As Shown
.Material: Plastic
.Product Weight: 1200g
.Package Dimensions: 37.5 x 30 x 7.5cm
.Package Weight: 1500g
.Packing: Graphic Carton
Package Content:
.1 x Engine Kit
.1 x User Manual
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 14 reviews
Sort
Product Reviews
★★★★★ 5
Works!
Theses strips work great and they are non-irritating!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
★★★★★ 3
Meh results
These sort of work….. but are a lot of work for me to use. morning and night. There just is NOT enough bang for my buck and also the whitening power misses BETWEEN my teeth so I feel gel in a tray is the next option or a one time whitening session from my dentist which includes trays and gel for later touching up!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
★★★★★ 5
Beginner friendly
Currently on my 9th day and definitely say a different after 4 days! This product is great and very much beginner friendly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 5
Fun hair
Color: DRF ESPRESSO BROWN
Love love love!!!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
★★★★★ 4
Looks good on!
Color: OFF BLACK 1B
This is a really pretty wig and looks good on. It eventually starts to tangle a little, depending on how often you wear it. Don't sleep in it. It's very soft.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026