The finished baseball infield for your centerpiece base will look like:
Items you will need:
12" square styrofoam, 1-1/2" thick
slightly larger piece of indoor/outdoor green grass carpeting
low temperature glue gun/glue
very sharp scissors
#9 baseball ribbon or team colors
white card board or card stock
additional enhancements, to taste
possibly acrylic rod, wooden dowels, curling ribbon, metallic paper flowers
Cut a piece of Styrofoam (1-1/2" is best) approximately 12" square. Cut some green indoor/outdoor carpeting a little larger.
Glue (using a low temperature glue gun) the carpeting to the Styrofoam, and trim off the excess.
Pin ribbon (#9 for 1-1/2") to the base.
Cut out bases from white card board and glue (also low temp) to the four corners of the base.
Garnish with related baseball items. Here are some suggestions -
Some examples of the how centerpieces we made look using the same base.