You can use pebbles or even raw beans. If you are using a battery-operated light, you could even use camping stakes through the bottom of the luminaries to secure them to the ground.
Sand fleas can be identified by small bumps and v-shapes, so once you've spotted a colony, grab a big handful of sand and set it on a bucket lid. Sift...
Mulberry leaf tea is a green tea, and a very healthy one to boot. The only catch is that the leaves must be washed very thoroughly before using them. Mulberry...