I have to help with decorations for a party coming up, and acorns fit the theme. I wouldn't want to use whole acorns, though... the nut part can have larvae in them, rot easily, and fall out. Empty acorn caps are easier to find this time of year.
Stuffing them with fabric gives them a finished but soft look.
You will need:
scraps of t-shirts in the colors you want
hot glue gun
dremel or drill (optional; I drilled holes in the caps so I can string these on a garland)
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Step 1: Drill Caps
You only need to do this if you're planning on stringing these.
Find a dremel or drill with a small drill bit. Hold the acorn cap steady and carefully drill two small holes at the top (to pass the string in and out).
Clean up any acorn dust so it doesn't get all over your t-shirt fabric.
Step 2: Cut T-shirt Pieces
Cut some circles from the t-shirt larger than the acorn cap. Cut some extra fabric to stuff inside the circle. I used the seams for stuffing, since they couldn't be used for the circles.
Wad up the stuffing, place it in the center of the circle, and gather the edges of the circle around the stuffing to make a little sack.
Step 3: Glue
Use hot glue to secure the edges of the circle together, pulling them together and smoothing out the round end of your stuffed fabric.
Squirt hot glue into the acorn cap around the inside edge. Avoid getting glue near the drilled holes if you want to string these when you're done.
Press the stuffed fabric firmly into the acorn cap, making sure all cut edges are firmly glued inside and not showing. Squish the fabric ball to minimize any folds showing.
I sprayed these lightly with metallic spray paint because of the party's color scheme, but you can just as easily leave them unpainted.
Thanks for reading!