Add-ons are counted separately from your kits. You'll receive exactly the number of each add-on you choose, no matter how many kits are in your order.
For example, if you order 2 kits and add 1 Beginner Workbook, you'll receive 2 kits and 1 workbook. If you'd like a workbook for each kit, just set the add-on quantity to 2 before you check out.
You can always check your quantities on the checkout page before you pay. Already ordered and need to add one? Contact us before your order ships and we'll help: https://tobioskits.com/pages/contact