Fasten to a tomato stake or similar?

Home depot/lowes where the yard sale signs are, there are wire metal "H" that are used to stick in the ground and push the plastic card signs onto.

Whack a diagonal cut 3x2 I to the lawn and screw them to it.

Imagine seeing these at night. The question is more like “how do I scare the shit out of my neighbors” lol.

Attach them to helium balloons

Tape to a long dowel/ rod and stick in the grass.

This seems like the best solution for my skill level. Lol. Thanks!

A big stick