Wheelbarrows are from scrap with a cut dowel wheel.
HIRST mold #85 and some castings made from it.Check out the site ( hirstarts.com ) for mold #70 (“stone walls“, use them for chimneys) as well as the Gothic molds I have used for vampire mansions. And if you’re onto SciFi check out those molds.
Closed books are another easy mini-project. Cut strips from mat board, then paint both sides and one long edge (for the spine). Slice the books apart using a single-edged razor blade, slice some of those into smaller ones. Add cover and spine embellishments for variety.