Create your own meaningful form. You can determine your focus on yourself, but the following requirements must be met:
you will need to send birthday and age items in the form. Check that the entered birthday corresponds to the given age. If these two data are not interconnected, make sure the form can not be sent.
when making a check box, give the user the opportunity to define his / her own response.
For example, there may be a question in the form (I hope you think something else) "what color do you prefer" with the answers "white", "blue", "red". Other "add-on" options should be added to the responses. Once this option is clicked, the user will see a text field not displayed until then, where he inserts his reply.
the form will have at least 3 interlinked lists, i.e., the contents of the second drop-down list will depend on the selection of the item in the first drop-down list, and the contents of the third drop-down list will depend on the selection of the item in the second drop-down list.
the part of the form will be adjusted according to which item the user chooses in the switch (made via the radio button), i.e., either change it to unclog or cover part of the form, or at least one item changes (for example, a man asks how much he weights and women whether he is happy with his weight).
in a single one-line text box, the email address that will contain at least one domain must have at least 2 domains, with the top domain having 2-4 characters. There must be at least 3 characters before the @.
the form will contain at least one textarea text box and a hidden text field into which you enter your name.
at least four mandatory form entries must be marked.
For each form entry, give the user help how to fill in the item. If the item is filled in incorrectly, it is important to let the user know (not when sending the form) immediately after leaving the form, exactly what is the error for which the form can not be sent