Presto! Clock Reaction Kit

Make two solutions and mix them together, then watch the colour change within seconds.
Out of stock
or 4 interest-free payments of $4.99
Learn more

Why Shop With Us?

Top Customer Service

Teacher Owned & Operated

Customer Loyalty Program

Showcased Product

Water Powered Jet Car

Water Powered Jet Car
Ready, set, splash! This water powered Jet Car is ready to race at high speeds and perform tricks. Water and air are all it takes to propel this car. All instructions are in the box! Get kids outside and learning fundamentals of STEM concepts.

Your own version of the famous iodine clock reaction in an easy-to-use kit.

Equipped with four transparent chemicals, make two solutions and mix them together, then WOW! Watch the color drastically change within seconds.

Experiment by altering the concentrations or temperature, and measure the time it takes for the color changes to appear. An innovaive kit that allows thorough exploration of solutions and rates of reaction (kinetics).

Age: 10+ with adult supervision. This kit contains chemicals which can be harmful if used incorrectly.

What You Get

Presto! Clock Reaction Kit. Includes four chemicals, sodium iodate, sodium sulfite, citric acid, and sodium thiosulfate, in five gram containers. Additionally includes 20 milliliters of a starch solution, a wooden rack, two stirrers, two spoons, eco-foam, three cups, and user instructions.

How Does it Work?

Presto! Clock Reaction Kit demonstrates the basics of kinetics, which measures and studies the rates and effects of chemical reactions. Performed with a combination of chemicals, simply mix two solutions together to observe a variety of color changing effects. From dark blue to clear again, this creative science experiment kit clearly showcases the principles of Briggs-Rauscher oscillating chemical reaction. Capable of providing hours of experimentation, this kit also makes it easy to explore various chemical reactions based on temperature and time changes.


  • Kinetics
  • Briggs-Rauscher Reaction
  • Oscillating Chemical Reactions

WARNING: CHOKING HAZARD - Small Parts. Not for children under 3 years.

More Information
Length (cm) 12
Width (cm) 12
Height (cm) 12
Age Group 9-10 Years, 11-12 Years, 12+ Years
Write Your Own Review
You're reviewing:Presto! Clock Reaction Kit
Your Rating
Best Sellers