I had no child's high chair. Had seen on TV once that someone had made something from a bath towel to secure the baby in a regular dining chair. I followed their directions and made one. It works well. I say "works" because I'm still using it. The oldest grandchild is 17 (It was made for him.) and it's still being used. The last one to use it was the second great grandchild. 5 babies have use it so far
Another thing I made was a bag for my easel. I designed it like the bags used with the beach chairs that fold up and are stored in a bag with a strap to carry over the shoulder. Once the easel is unassembled, there are several long pieces that are difficult to keep together. I just slip them all into the bag and store standing in a corner or closet.