Suggestion5.3.1 release eggshell from soluble instead of smearing the chalk to make it easier to use in the home.5.3.2 if there is an opportunity to do experiments with ants or insects, different types and other types of egg shell.
Suggestions 5.3.1 lead soluble egg shell, instead of applying the chalk to be easy to manufacture their own use in 5.3.2, if the opportunity should experiment with ants or insects and other egg.
Suggestions 5.3.1 the eggshell to dissolve in water, instead of making a chalk to be easy to produce the in house 5.3.2 if you have the opportunity to experiment with various insects and ants or other kinds of eggshell