No, you do not have to physically print your tickets. If you have a smart phone you can open the ticket attachment and present this to the Model Citizen at the main entrance (Turnstiles) who will scan them and grant you access to the theme park.
If you have not received your tickets, please search your Spam folder for “LEGOLAND” or you may visit our self-service portal, Manage My Booking by clicking here.
Once you have logged in. Select "Travel Documents" then click on View & Save, on the line it says "Voucher". You will now be able to download and print your tickets.