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mercury-free)
Battery Maintenance: To ensure the long life of your lithium-ion battery
The brighter the sun hits the panel
camping or every day
Science Time Solar MusicBox hourglass mercury-free)Build your own music box that plays with the power of the sun! The educational Science Time Solar Music Box set is an extraordinary combination of creative fun, learning about renewable energy sources and music! Assemble the model effortlessly using the excellent instructions, then place it in the sunlight. You'll see and hear how clean, free solar energy brings the melody to life without the need for any batteries or other power sources! Main