Gather the prettiest leaves you can find, sandwich them in sheets of wax paper, stack up your heaviest books, and tuck the leaves into the pages of the bottom book. Usually leave them in the book stack for a week or so.
DIY acorn frame for autumn. Could make an Autumn recipe card instead and hang a couple on the wall or sit them on a small saucer holder. I would also make my frame a bit dif. but, here is the general idea.
Make a pressed glass picture by buying two dollar store frames, then taking the glass out of one of them and using it for the backing of the first frame. Place your favorite pressed leaf in between the two glass panes. DIY art/DIY see-through glass frames
Fall Cold Frame - Building a garden cold frame is a great additional to your garden. Cold frames allow you to extend your garden season all the way through the fall and into the winter months! A serious gardener idea.