Heartbleed Security Vulnerability Fixed   •   Get 2 Free Sick Science! Kits   •   Free Experiments by Email

On Monday we learned about a vulnerability in the encryption technology that effects most of the internet, called Heartbleed. Our team grabbed their lab coats and leaped into action to patch the vulnerability on our site.

We are happy to announce SteveSpanglerScience.com is no longer vulnerable.

While we believe we have kept out all the bad guys, we want to make sure our customer's information is safe. We are requiring that all of our customers change their password for their accounts on SteveSpanglerScience.com.

To do so, click the link below and enter in the email address associated with your account. Once you receive an email to that account, follow the simple instructions to reset your password.

Reset your password - https://www.stevespanglerscience.com/customer/account/forgotpassword/

If you have any questions on password resetting, please call our Customer Service team and they will be happy to help you. 1-800-223-9080

If you have any questions about the vulnerability please email security@SteveSpangler.com

As this did effect most of the internet, we also recommend that you change your passwords on all of the websites you visit.

Thank you for being an amazing customer!

-- The SteveSpanglerScience.com Team

Questions? Give us a Call: 1-800-223-9080

Giant Growing Lizard

This lizard starts at 30 cm and grows to an impressive 1 meter!


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Item #: WLIZ-500

Usually ships the next day.

Recommended for age 4 and up with adult supervision.

Availability: In stock

Giant Growing Lizard

It's the conversation piece in the Spangler Labs... people walk in and say, "Holy Fright! Where did you get that?" This lizard starts out 30 cm (12 in) long and grows to an impressive meter (36 in). We're not sure just how big he'll get because he just keeps growing. Of course, you can dry him out and watch him shrink back down over time (just how much time depends on your humid climate). Your kids will go nuts!

The difference between our product and that of our competition is that we include a comprehensive activity guide which provides valuable activities and classroom connections to help demonstrate the scientific principles behind our growing creatures.

Body Parts in a Jar

What's Included?
  • 1 Giant Growing Lizard
  • Full Color Activity Guide
How Does It Work?

Just submerse the giant growing lizard in warm water and watch as he grows into a giant creature. The process may take quite a few days, but the results are worth the wait. The lizard can also be taken out of the water and allowed to shrink back to his original size.

Customer Reviews

growing lizard Review by Rhonda Beatty-Gallo

These lizards take time to grow and you need space to allow the growth to fully happen. The kids were amazed at the process and final outcome. It was fun for all of us, and especially fun to see it shrink down again. (Posted on 5/8/13)

Growing Lizards Review by Elizabeth Beckwith

These work great in my science lab. I bought large rubbermaid tubs for them and the grew huge! We measured and outlined them daily. The children were fascinated. Last summer we did an experiment on which solution grew the biggest lizard...from filtered water, tap water, carbinated water, and rain barrel water. You will have to buy these and try it to know the answer! (Posted on 4/8/13)

A Big Croc in a Little Package Review by Marilyn Walker

Love how you've combined science with a magical toy. (Posted on 3/11/13)

Fantastic Review by Lori

I have used this product in my classroom for the last two years. The kids love it and it is a great way to teach them about measurement. (Posted on 2/3/13)

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  • Why did it fall apart?
    If your water is too hot, it will cause the creatures to disintegrate. While warm water works best, make sure that it isn't too hot.
  • Why does it have a hole in its belly?
    The hole is to let water into the creature, since it is hollow, and allows all sides of the polymer to grow evenly.
  • How long will it last?
    As long as the creatures are handled carefully, they will last for a long time. Since you are able to take it out of the water and have it evaporate, you will be able to regrow it numerous times.
  • Why is it “leaking” polymer?
    The skin is packed so tight that some excess tends to leak off.
  • How long does it take to grow to its full size?
    About a week and a half to two weeks. It makes the perfect activity to measure every day to see how much it has grown over one day.
  • Is it reusable?
    Absolutely. Take the creature out of the water and, depending on how humid your climate is, it should take about 3 weeks to a month to shrink to its original size.