<form action="" method="get">
<fieldset>
<legend>Personal info:</legend>
<label for="first_name">first name:</label><input type="text" name="first_name" id="first_name"><br/>
<label>last name:</label><input type="text" name="last_name"><br/>
</fieldset>
<br/>
<fieldset>
<legend>Hobbies:</legend>
<label>sport</label><input type="checkbox" value="sport">
<label>sport</label><input type="checkbox" value="gaming">
</fieldset>
<br/>
<input type="submit" value="submit">
</form>