This kit allows you to enjoy over 20 experiments while learning about surface tension. - Product Name: Bubble Miracle Experiment - Number of Experiments: Over 20 - Target Age: 6 years and older - Contents: Experiment kit - Themes: Surface Tension / Bubbles Thank you for viewing. This item is unopened, unused, and has been stored for a long time. Since it is unopened, there is no guarantee of the condition of the bubble solution or the functionality of the product, as it requires assembly by the user.