How can I sign up to Make a Splash? You can sign up online: Sign up to Make a Splash If you are under 16 years old: Sign up to Mini Make a Splash Simply choose your distance, fill out the form and pay the registration fee. (All payments are sent encrypted and no payment details are stored on our servers). Once we receive your payment, a welcome pack will be sent out to you, which includes your swim cap. Manage Cookie Preferences