Lemon Clock Kit
EDU 3020 Lemon Clock Kit Make your own digital clock using nature’s electricity. The kit includes over 18 experiments including LED’s, chemical reactions, electrochemistry, electromagnetism, acid/base substances, and invisible inks.
Ages 8 & up
ELENCO EDU-3020 Lemon Clock Kit educational, science, electronic, technology kit.
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SC-750R Snap Circuits Extreme Student Version 750 in 1 Experiment Lab With Computer Interface Case and Student Guide