Print on construction paper and present with an oversized push-pin or other pin-pushing tool and a thick felt mat/mouse pad/cork trivet.

For control-of-error, you can trace just the outline of the acorn with a black marker to show the child where to pin-push.

Pin-pushing is so great for preparing the hand for writing and has many other benefits! If you're not sure how to show your child how to do pin-pushing work, you can find step-by-step guides online by searching "Montessori pin-pushing"!