An educational toy that allows you to enjoy over 20 experiments while learning about surface tension. - Product Name: Bubble Miracle Experiment Kit - Number of Experiments: Over 20 - Target Age: 3 years and up - Manufacturer: Gakken - Contents: Complete set of experimental equipment - Theme: Surface Tension Thank you for viewing. Unopened and unused, it has been stored for a long time. Since it is unopened, there is no guarantee of the condition of the bubble solution or the operation of the product, as it requires assembly by the user.