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"Ice Tunnels" combine ordinary salt, ice and liquid watercolors in an unforgettable art and science experiment that costs only pennies. Try this on sunny day with lots of bright sunlight and you'll experience amazing color, light refraction and salt crystallization with a hands-on experience for children of all ages.

from Babble

25 DIY Educational Activities for Kids

This is an awesome science experiment to help students understand the movement of water through plants . The only thing I dislike about this experiment is there were no direction .

Salt & Watercolor Painting -wet paper - dot/splash with bright watercolors - sprinkle with salt - when dry, brush off salt - instant masterpiece

from BuzzFeed

33 Activities Under $10 That Will Keep Your Kids Busy All Summer

30 Family Activities- lots that involve simple science experiments that are loads of fun for kids!