Best in 7 days
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Ships within 48 hours · Estimated delivery Aug 22 - Aug 27
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Description
Springer Spiral Spring Science KitExplore the secret of clockwork mechanisms. Discover spring power! Have you ever wondered about the power source of a wind up car or where the ticking sound of a clock comes from? The secret lies in the mainspring. Centred on the clockwork is a spiral torsion spring where you will be able to store energy by winding it tightly. Then release it to trigger the inner mechanical operation and watch your spring timer, spring car or spring bot start moving!
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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- We offer a 30-day return/exchange service after receiving.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.3 ★★★★★
Based on 667 reviews
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Product Reviews
★★★★★ 5
Wow!
Color: Black, Color: Black
After wearing lash extensions for over a year, I decided to give my lashes a break. This product has everything you need in one tube! Results are amazing! Photos show bare lashes. Next photo is one coat!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
★★★★★ 5
Colorscience total lash peptide serum mascara
Color: Dark Brown
I love this mascara. The color is perfect. It has serum so you are doing something good for your lashes while you wear it. It gave my lashes length and definition. Very pretty.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
★★★★★ 1
Doesn't work
Color: Dark Brown
Not effective for growing lashes. I've used it daily as directed and hoped it would work but there is no change in my lash length or density after months. Not even a "good" mascara for daily aesthetics. Overpriced, would not purchase again.
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Reviewed in the United States on June 3, 2026
★★★★★ 5
Really works
Color: Black
Simply put, amazing!!
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Reviewed in the United States on October 25, 2025
★★★★★ 3
Eh. It's fine
Color: Black
I feel like this mascara is okay. Not fantastic, not terrible. I like a dramatic lash and this mascara doesn't give me the drama. I have been using it for about a month, so I can't really speak much to how well it helps the lashes grow. I haven't noticed any difference yet. It does flake a bit, but not a lot. Really just okay.
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Reviewed in the United States on June 5, 2026
![Used 420874394 FUEL RAIL ASS'Y [S760-004]](https://cdn.shopify.com/s/files/1/0570/4089/6194/products/S760-004_1.jpg?v=1633789289)
![Used 270600043 THROTTLE BODY ASS'Y [S259-025]](https://cdn.shopify.com/s/files/1/0570/4089/6194/products/S259-025_1.jpg?v=1633789041)
