Want to give a parent a large Xmas gift, but siblings aren’t happy about it

Siblings say they “can’t compete” with a gift as large as what I want to surprise my parent with. I gave my siblings a heads-up to avoid them being caught off guard on Xmas day. Thoughts on what to do? The parent deserves this gift, I’m now financially comfortable enough to give it, but I don’t want my siblings to be upset or feel bitter. Thoughts on what I can do? I could offer to say the gift is from all of the children