Eli is only 18 mos. so we are just getting started on some of these projects. We layered masking tape on old cardboard milk cartons, completely covering them, and colored on the tape. These boxes hold crayons and markers.
We took an old water bottle and filled it 2/3 full with mineral oil and added some food coloring (blue). Fill it the rest of the way with water and use a glue gun to glue the lid on. This wave bottle is fascinating to anyone who sees it, not just Eli.
We made some bean bags that are excellent for throwing and hiding. We used old scraps of fabric and split peas I can no longer stomach and some adzuki beans I once bought but could never figure out how to cook.
I have thousands (it seems) of those plastic containers tofu comes in and I can't recycle them (they don't take them at the recycling center) and I can't throw them out (guilt) so I'm looking for something to make from them. Any ideas?