• Build a digital clock that runs on tap water or other household materials like fruit juice and cola!
• No need for batteries!
• This “liquid battery” also powers a light emitting diode.
• Easy-to-use, and will make kids smarter. Age 8 & Up

• Build a digital clock that runs on tap water or other household materials like fruit juice and cola!
• No need for batteries!
• This “liquid battery” also powers a light emitting diode.
• Easy-to-use, and will make kids smarter. Age 8 & Up
