My little brothers are 19 and almost 21. When they were little I bought them gifts for bdays, and when they were teens I sent $ in a card.
The 21 yr old is in Korea and asked me if I wanted LV or Coach bags for my bday (well made knock offs). I mentioned a Coach diaper bag would be great of he can find one! The boys don't usually buy me gifts (mom always signed their name to a card), so I thought now that they are adults I would stop buying or sending $ and just send a card.
My step siblings and I do not exchange bday gifts anymore by mutual decision.
If you have siblings, do you still buy them gifts for birthdays?