Chevron down icon Chevron down icon Loading icon Zoom icon Click to expand Tap to zoom KidzLabs: Lemon Clock $8.00 Availability: Translation missing: en.general.icons.icon_check_circle icon Only 2 left! 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Kidz Labs Lemon Clock: Discover how the citric acid from a lemon can be used to power a digital clock. All you need is a lemon to do this experiment. 4M Ages 5+