Cost, Durability, and Safety

Cost: $40 - $50, the flavor dyes would be under $5 and last several runs.

Durability: The pieces would be plastic and thus fairly durable. However, the water flowing through them would be the biggest concern. This toy should be played with outside or in an area that can get colored water on it. Additionally, the parts would need to be easily cleaned. Thus, they would hopefully be made from a dishwasher safe material.

Safety: There are no parts that could be swallowed. However, the parts would have to be thoroughly cleaned to prevent mold which would be unsafe.