Have kids create their own crowns so they can pretend to be kings and queens. For each crown, start with a long yellow strip of paper, at least 6 inches wide and 18 inches long. Help the kids cut one side of the crown into spikes. Kids can decorate their crowns with glitter, markers, paint, sequins, imitation jewels and other art supplies. When the crowns are dry, fit each one to the child's head and staple the ends of the crown into place. For an activity, have kids pass their crowns down a line to mimic how the rulers passed on leadership down through the royal family.
When studying historical kings and queens, a preschool class can work together to build a castle mural on a bulletin board or classroom wall. To make the castle walls, have students sponge paint rectangles of paper to act as stones. After they are dry, gather all of the stones and arrange them in the shape of a castle. Create a flag to hang above the castle by having each child dip his hand in paint and stamp it on a rectangle of fabric.
Each royal family had its own coat of arms or royal crest that was symbolic of that family. Have children make their own coats of arms showing symbols that are important to their family. Give each child a piece of cardboard or cardstock in the shape of a shield for the base. Have kids draw pictures or create a collage with pictures they cut out from magazines that depict things their family cares about.
Kings and queens were very wealthy and usually had many jewels. Set up a few activity stations related to jewels for preschoolers to explore. At one station, hide small toy jewels in a bucket of sand and provide sifters for children to sift out the jewels. At another station, provide two identical sets of jewel pictures and have kids try to match each jewel picture to the other one that looks just like it. You can also have a station with some real or imitation jewels or gemstones for kids to look at under a magnifying glass.