Good evening Louise and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
We want to be able to apply a discount if a user books 3 events, is that possible?
The actual purchase process is completely handled by the e-commerce plugin of your choice when you use our Event Tickets Plus plugin (e.g.: WooCommerce).
This is great news, because it means you can use a plugin to handle volume discounts. In fact, there are a few available out there. E.g: https://wordpress.org/plugins/woocommerce-bulk-discount/
Also if someone is booking a sibling on the same event they should also get a discount so is there a way of adding a variable price option?
You can have multiple ticket types per event. This means that you could have a “Sibling” ticket available or use a discount CODE for that purpose.
Let me know if that helps.
Have a great day!
Geoff B.