Steve Spangler Science

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 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

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 -

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

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 Team

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

Halloween Sounds - Screaming Cup

You've never heard a sound quite like this from an ordinary cup!

Rating: 43211

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You've never heard a sound quite like this coming out of an ordinary cup! It's the perfect sound effect to carry door-to-door on your Trick or Treat adventure.

  • Large plastic cup
  • Piece of string (24")
  • Water
  • Violin rosin (optional)
Print Experiment


  1. Start by poking a hole in the bottom of the cup just large enough to thread the piece of string.
  2. Thread the string through the hole and tie a knot or two at the end of the string to hold the string in place.
  3. Wet the string or coat the string with violin rosin.
  4. Holding the cup in one hand, pinch the string between your thumb and forefinger. Squeeze tightly on the string as you slide your thumb and forefinger down the string. With practice and a little patience, the string will "stick and slide" between your fingers causing a "screaming" sound. Oh, you'll know when you've got it down to a science!

How Does It Work?

Sound is transmitted through the air by vibrations. As your fingers slide across the string, vibrations occur in the string. The violin rosin makes the string stickier and increases the "stick and slide" effect. The vibrations caused by "stick and slide" cause the cup to vibrate, which results in the amplification of sound. In other words, the cup produces an incredibly eerie scream! Try differently shaped cups and determine what this change does to the sound.

Customer Reviews

Scream Cups Review by Lauren

These are fun and easy. Our high school science club made them and had a blast, but the science behind them is more elementary.

(Posted on October 30, 2009)

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