Finding the best 21st birthday gift ideas can be hard to get right. Luckily, we understand how important the 21st birthday milestone is and have curated a range of memorable gifts to celebrate their special day. Gifting a helicopter flight over Sydney will definitely take their 21st birthday presents to a whole new height. If you want to be crowned hands-down the best gift giver ever, shark diving at Sea Life Melbourne aquarium is one of most thrilling 21st birthday ideas and an experience of a lifetime. If you're after something a little more relaxed, treat their inner foodie to a pizza making class. We've put together all our favourite 21st birthday gift ideas to make your present more memorable than their party!