You need to add minimum 3 references to your TOY profile - but you can add more. You can do this via your TOY dasboard (when you log in to your TOY profile). The references need to fit the minimum criteria.
You can only save complete references (all boxes need to be filled out), otherwise you will get an error message asking you for more information. You can of course add a few temporary words and elaborate more at a later stage.
When you are ready with your reference, you should ask a reference person for the activity to 'validate' (approve) it. Click the 'request validation' button and add your reference person's contact details - and a personal message if you want.
You need to request one validation for each training reference from your TOY profile.