No Contact, and a birthday gift for my son (his ex step-son)

My narc and I have been divorced for two weeks, and I have maintained no contact. He's blocked from everything, my phone, texting, work number etc...My son's birthday was this Saturday. My son is not his bioligical son, however my son adored him and was always eager to please him, they both got along great except for when he would leave, my son would be in tears (jerk). Anyhow last Thursday we got home from my sons baseball game (which he has access to his schedule, it is online) and we saw a beautiful "Happy Birthday" bag with a card in it on our doorstep. Sure enough it was from my Ex-Narc. I knew what the gift was because he bought it a month ago. Underneath the bag was a wallet that I had given my Ex-Narc several years ago, I guess he thought it would be appropriate to return it along with the birthday gift for my son.I have been through the Narc Cycle many times. I have never experienced this part of it. The gifting? I have no idea if he called or texted me prior or if he has now because he is blocked. My question is: Is this a hoovering move? What should I expect next? Do I need to be prepared for anything? Anyone experience this before? I have read a little about this, regarding the gifting but have not experienced it. I have although experienced hoovering from him directly to me several times. This is different. Guidance is appreciated.