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We have a cool book at home called "730 Easy Science Experiments with Everyday Materials." It was on sale for like, $5.00 or something at the mall. I know amazon just started carrying it. Do you have that one?
(1) What about cleaning a penny w/ lemon juice or something like that?
(2) Making red cabbage or berry "litmus" paper.
What do you have in mind for bonding? Something like kool-aid vs. italian dressing, or water vs. ice? I'm not sure what you're asking for.
"For covalent, polar and ionic bonds, think of sharing sweaters with a
sibling who wears the same size. Both of you want to wear a different
sweater each day of the week, but each of you has only 5. So if you
each share 2 of yours equally (covalent), both of you have a share in 7
sweaters. If one of you has extra sweaters and donates some to the
other (ionic), you both can have 7. If one of you if not playing fair and
takes the siblings sweaters more often than allows the sibling to use
them, you have unequal sharing (polar covalent bond)."