Memory blocks or one that says DAD- I think this would be great to teach spelling and matching. Have blocks that have only pictures of thing s/people (I. mom, dad, dog) have them find hose pictures and then put the letters in order. And spell.
Good Survival Kit info here. You will never look at an empty pill bottle the same after you see these creative upcycles. Remember, health doesn't come from plastic bottles, but if it does, make something fabulous with them afterwards.