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Tubes is an educational construction toy designed for use in the bathtub for children between the ages of 5 and 12 years old. The Tubes set is a variety of interlocking parts, which can be assembled in various sequences for water play.

Tubes provides children with the ability to play, explore and manipulate the arrangements of parts, while experimenting with the principles of fluid dynamics and energy conversion.

Many of the parts in the set are designed to conduct water, while others respond to gravity water flow. Once the Tubes system is built, water is poured into the top of the structure. The water travels through Tubes, with the water flow activating different functions of the construction set.

Tubes is assembled by coupling male and female ends with an interference snap fit. Clip suction cups allow attachment to vertical surfaces.

U.S. Patent Number: 5,385,472